what did went’s experiments with the gelatin block demonstrate?A. Plants cannot be induced to bend during growth unless they are exposed to an indirect source of light.
B. Light induces the coleoptile to produce a diffusible substance that moves to the growing region of a plant where it stimulates cells to elongate.
C. Gelatin can enhance the movement of a soluble factor from the growing region of a plant to the coleoptile where it accelerates growth.
D. When a plant tip is removed from a growing plant, the plant acquires the ability to bend toward the light.

Answers

Answer 1

Went’s experiments with the gelatin block demonstrate (B) Light induces the coleoptile to produce a diffusible substance that moves to the growing region of a plant where it stimulates cells to elongate.

In his studies using the gelatin block, Went showed how light encourages the coleoptile to create a diffusible material that travels to the plant's growth area and prompts cells to elongate. The growth and bending of plant parts towards a light source are known as the phototropic response of plants, which is caused by this chemical, which was later named auxin.

In the experiment, Went used a gelatin block to impede the transport of auxin in the coleoptile, preventing the substance from traveling toward the plant's growth area. This illustrated the significance of auxin in phototropism by causing the coleoptile to bend away from the light source.

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Related Questions

A group of scientists was examining a newly discovered unicellular organism in order to classify it as a prokaryote or eukaryote. Which of the following tests would the scientists most likely perform to determine if the organism is a prokaryote or a eukaryote?
a. Stain to determine if the organism had a cell wall
b. Stain to determine if the organism had cytoplasmic ribosomes
c. Stain to determine if there were distinct regions within the organism
d. Stain to determine where phospholipids were present in the organism

Answers

Eukaryotic cells contain a membrane-bound nucleus, whereas prokaryotic cells do not, and this is the main difference between these two types of organisms.

Why do prokaryotes differ from eukaryotes?

Prokaryotes are usually unicellular, unlike eukaryotes, which frequently have numerous cells. Between 100 and 10,000 times bigger than prokaryotic cells, eukaryotic cells are also more complex and massive. DNA is kept in the cytoplasm of prokaryotic cells as opposed to the nucleus in eukaryotes.

True nuclei are missing from prokaryotic cells, and eukaryotic cells are the only ones to include membrane-bound organelles. The fact that prokaryotic cells are solely monocellular, in contrast to eukaryotic cells, is another significant distinction between the two types of cells.

Eukaryotic cells contain a membrane-bound nucleus, whereas prokaryotic cells do not, and this is the main difference between these two types of organisms.

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True/ False ? plant does not produce morphologically different types of gametes

Answers

Plant does not produce morphologically different types of gametes. True. In isogamy male and female sex cells have the same morphology.

Plants reproduce sexually and asexually. Sexual reproduction in plants is often referred to as generative reproduction in which male and female cells fuse to produce fertilization.

The reproductive organs of generative reproduction in plants are flowers where the pistils are the female genitalia and the stamens are the male genitalia. One type of reproduction in lower plants is isogamy. Isogamy is sexual reproduction in plants where male and female sex cells have the same shape and size. Types of gametes that have the same morphology are found in Ulotrich algae plants.

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select all of the following that correctly describe archaean cells.A. Lack nuclei and organellesB. Most have cell wallsC. Arise before BacteriaD. Can have flagellaE. Eukaryotic

Answers

Archaean cells lack nuclei and organelles, and most have cell walls. They are considered to be some of the earliest forms of life on Earth, predating bacteria and the evolution of eukaryotic cells. (option a and b)

Archaeans are single-celled microorganisms that are classified as prokaryotes, meaning they do not have a true nucleus or membrane-bound organelles. Instead, their genetic material is dispersed throughout the cytoplasm. Some archaeans do have cell walls, which help protect the cell and maintain its shape.

While some archaeans can have flagella, a structure used for movement, they are not eukaryotic. Eukaryotes are defined by their possession of a nucleus and other membrane-bound organelles, which were not present in the earliest forms of life. Overall, archaeans represent a unique and diverse group of microorganisms that have adapted to survive in a variety of extreme environments.

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Which process is the daguerreotype an early example of?

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a. Photography process is the daguerreotype an early example of.

In the history of photography, the daguerreotype (1839–1860) was the first commercially viable photographic technique. Each daguerreotype, which bears Louis Jacques Mandé Daguerre's name, is a distinct photograph on a copper plate that has been silvered.

The camera obscura picture may be photographed and preserved as a physical item thanks to the daguerreotype method. A new era of photographic possibilities began with the invention of the first viable photographic process. Louis Jacques Mandé Daguerre created the method in 1837. (1787–1851).

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Full Question: Which process is the daguerreotype an early example of?

a. Photography

b. Symbol c. Typography d. Illustration

How do you describe a knee joint?

Answers

The knee is the point where the upper and lower leg bones converge. The knee, the largest joint in the body, acts as a pivot  and allows you to sit, squat, walk, and jump.

The femur, often known as the thigh bone or upper leg bone, makes up the knee. The knee is referred to as a pivot joint. Together with the ankle and elbow, it is categorized as a synovial joint. It functions to flex (bend), extend (straighten), and has some rotation as well.

The action of bending your knee reduces the angle between your thigh and your shin. Try to imagine curling your heel toward your glutes. An action that widens the angle between your thigh and your shin is knee extension.

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In the sense of "alternation of generations", how many "generations" are included in a mature pine seed?

Answers

In terms of "generational alternation," a grown pine seed comprises only one generation, the sporophyte generation.

How can it be explained in detail?

The sporophyte generation generates spores by meiosis, and the spores germinate to give rise to the gametophyte generation. The gametophyte generation is relatively tiny and short-lived in the life cycle of a pine tree, existing within the reproductive structures of the sporophyte generation. The pollen grain contains the male gametophyte, which creates sperm cells, whereas the female gametophyte, which produces egg cells, is found within the ovule. Fertilization between sperm and egg cells results in the production of a zygote, which subsequently develops into the sporophyte generation, culminating in the formation of a mature pine seed.

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what is the smallest unit of life and can grow, reproduce, and perform certain basic functions.

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The smallest structural and functional unit of living things that can exist independently is the cell. As a result, it is sometimes referred to as the foundation of life.

The most fundamental and smallest unit of life is a cell. Every living thing is made up of cells. Existing cells undergo a two-step division process to create new cells. Because of the union of two cells when they were still in your mother's womb, you are who you are. The two cells that hold all of your DNA joined together to start the process of creating new life. The body's multiple organs, systems, blood, blood arteries, bone, tissue, and skin were formed as a result of cell division and differentiation into additional cells with distinct tasks.

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Which type of incontinence causes the individual to urinate involuntarily after experiencing a sudden urge to urinate?a. Mixed incontinenceb. Overflow incontinencec. Urge incontinenced. Functional incontinence

Answers

The type of incontinence that causes the individual to urinate involuntarily after experiencing a sudden urge to urinate is c. Urge incontinence.

Urge incontinence is also known as "overactive bladder" and is caused by involuntary contractions of the bladder muscles. This can lead to a sudden and strong urge to urinate, even if the bladder is not full. The urgency may be so strong that the person may not be able to make it to the bathroom in time, resulting in urine leakage.

Other types of incontinence include stress incontinence, which is caused by weakened pelvic muscles and results in urine leakage during activities that put pressure on the bladder, such as coughing, sneezing, or exercising. Overflow incontinence is caused by a bladder that doesn't empty properly, resulting in constant or frequent dribbling of urine. Mixed incontinence is a combination of both stress and urge incontinence. Finally, functional incontinence is caused by physical or mental limitations that prevent the individual from getting to the bathroom in time.

Overall, c. Urge incontinence causes the individual to urinate involuntarily after experiencing a sudden urge to urinate.

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When Elodea leaves were placed in 10% NaCl, what was the result? a. The cell membrane shrank away from the cell wall because the solution was hypertonic. b. The cell membrane shrank, buy the central vacuole remained full
c. the cells burst because the solution was hypotonic
d. the cell became turgid

Answers

The correct answer is The cell membrane shrank away from the cell wall because the solution was hypertonic. Option C

A solution is referred to as hypotonic if it contains fewer solutes than another solution. A solution cannot be hypotonic, isotonic, or hypertonic in the absence of a reference solution. Hypotonic is a term used to define how many solutes are present in one solution as opposed to another. It assists biologists in describing cells. By comparing the osmolarity of several solutions—the concentration of a solution in terms of the number of solutes per litre—scientists can forecast the direction in which the water gradient and solute gradients will arise. Due to the characteristics of diffusion, every solute in a solution has a tendency to scatter away from one another until they are evenly spread. The interactions between polar water molecules and the solutes in aqueous solutions are primarily responsible for this.

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What is the psychological significance of object permanence?

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Object permanence is a cognitive milestone that refers to a child's understanding that objects exist even when they are not visible.

This ability usually appears around 6-8 months of age and is an important part of cognitive development.

The psychological significance of object permanence can be seen in several key areas are:

Separation anxiety: As infants develop object permanence, they realise that their carers exist even when they are not visible. When the carer leaves, the child may experience separation anxiety because the carer has not simply disappeared, but has gone away.

Language development: Object permanence is a precursor to the development of symbolic thought, which is the ability to represent objects and concepts using words or other symbols. Children begin to understand that objects have names and can be referred to using language as they develop object permanence.

Memory: Object permanence is also important in memory development. Once children understand that objects exist even when they are out of sight, they can begin to form mental representations of those objects, which can later be used to retrieve memories of the objects.

Problem-solving: Object permanence is also essential for problem-solving abilities. Once children understand that objects exist even when they are out of sight, they can consider ways to retrieve or access those objects, such as moving obstacles out of the way or searching in new locations.

Overall, object permanence is a crucial cognitive milestone that lays the foundation for a range of other cognitive skills, including language development, memory, problem-solving, and social development.

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which objective should be in place when the microscope is put awayA. 100x (oil objective / lens)
B. 40x (high dry / power objective )
C. 20x (low power objective)
D. 4x (scanning objective)

Answers

The objective that should be in place when the microscope is put away is the 4x (scanning objective). The correct answer is D.

When putting away a microscope, it's important to always start with the lowest power objective in place, which is the 4x (scanning objective). This is because it has a wider field of view and is less likely to be damaged if accidentally bumped or touched.

In contrast, the higher power objectives like 20x, 40x, and 100x have smaller fields of view and are more delicate, making them more susceptible to damage.

Therefore, it's important to switch to the 4x objective before turning off and putting away the microscope to ensure its safety and longevity.

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In what phase does the following event occur? Chromatin condenses to form chromosomes.

Answers

Prophase is the beginning and shortest phase of mitosis. chromosomes are assembled during prophase, and nuclear envelope the covering enclosing the nucleus disintegrates.

What stage of chromatin condensation gives rise to chromosomes?

The chromatin, a combination of both DNA and proteins found in the nucleus, condenses during prophase. The development of discernible chromosomes is caused by the coiling and tightening of the chromatin.

During prophase or interphase, does chromatin condense?

Chromatin is most loosely dispersed and appears to be present throughout the nucleus during interphase (1). Prophase (2) marks the beginning of chromatin condensation, when chromosomes start to show. The several stages of mitosis don't change the condensed state of chromosomes (2-5)

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depiction of the plasma membrane as a semifluid phospholipid bilayer with proteins and carbohydrates attached to lipids and/or proteins are called

Answers

The term "fluid-mosaic model" refers to the representation of the plasma membrane as a bilayer of phospholipids that is semi-fluid and to which proteins and carbohydrates are linked.

Since the cell membrane is composed of a variety of molecules that are dispersed throughout the membrane, scientists describe how the membrane appears and operates using a “fluid-mosaic model”. If you were to close your eyes and look closely at the cell membrane, you would notice a mosaic-like pattern made up of several sorts of molecules. Similar to icebergs floating in the water, these molecules are always moving fluidly in two dimensions. It is impossible to create a barrier that is entirely impenetrable due to the movement of the molecular mosaic.

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Genetic variation is accomplished by all but one of the following. Which one is it?a. The events of meiosis IIb. Independent assortmentc. The events of meiosis Id. Crossing over

Answers

Genetic variation is a result of many different processes that can lead to changes in the genetic makeup of a population over time. Three of the processes listed in the question (a, b, and d) are indeed ways in which genetic variation can be accomplished:

The events of meiosis II: This process leads to the segregation of chromosomes, which can result in the formation of genetically diverse gametes.

Independent assortment: This refers to the random alignment of homologous chromosomes during meiosis, which can result in the formation of gametes with different combinations of genes.

Crossing over: This is the exchange of genetic material between homologous chromosomes during meiosis, which can result in new combinations of genes and increased genetic variation.

The process that does not contribute to genetic variation is the events of meiosis I: This process does not directly contribute to genetic variation, as it only leads to the division of chromosomes and not to the exchange or rearrangement of genetic material.

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for each trait, how many alleles do the gametes carry?

Answers

For each trait, the gametes carry one allele.

During meiosis, chromosome pаirs аre split аpаrt аnd distributed into cells cаlled gаmetes. Eаch gаmete contаins а single copy of every chromosome, аnd eаch chromosome contаins one аllele for every gene. Therefore, eаch аllele for а given gene is pаckаged into а sepаrаte gаmete. For exаmple, а fly with the genotype Bb will produce two types of gаmetes: B аnd b. In compаrison, а fly with the genotype BB will only produce B gаmetes, аnd а fly with the genotype bb will only produce b gаmetes.

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Please help I will give Brainly

Answers

The most likely reason for these variations in the Galapagos finches' beak size and shape was that populations were separated and developed different adaptations over time to suit their particular environment.

The correct option is A.

What did Darwin observe about the Galapagos finches' beak size and shape?

Darwin observed that the Galapagos finches' beak size and shape varied from one island to another.

According to the available food on each species' island, he observed that the beaks of the various finch species varied. Finches that consumed huge nuts possessed powerful beaks for cracking open the nuts. Finches with beaks for cracking nuts and seeds were birds that consumed little amounts of them.

Long, pointed beaks were useful for seizing insects in the case of finches, while broad, flat beaks are best for cracking seeds and nuts.

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What is the analogy of a cell project house?

Answers

Answer:The nucleus of a cell is like your parents.

Explanation:our parents control most of things that take place inside your house. The cytoskeleton of a cell can be compared to the walls of a house. The walls of a house are similar to the cytoskeleton of a cell because they provide support for a house.

Final answer:

The cell project house analogy is used to simplify the understanding of a cell's structure and function. Different parts of a house represent various parts of a cell, such as the nucleus compared to the control center or the cell membrane to the house walls, reinforcing the idea of every cellular structure having its unique role.

Explanation:

The analogy of a cell project house is used to make the complex functions and structure of a cell more understandable. In this analogy, different parts of a house represent different parts of a cell. For example, the nucleus is often compared to the control center or brain of the house - the place where the critical decisions are made. The cell's cytoplasm can be compared to the house's living area, where much of the everyday activities take place. The cell membrane is like the walls of the house, protecting everything inside while also allowing specific elements in and out. Just like each room in a house has a unique function, every cellular structure (organelle) has its own specialized job too.

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These bases are of two different types of molecules: purines and pyrimides. Purines have _______________________ ring(s) in their structure, and pyrimidines have _______________________ ring(s) in their structure.

Answers

These bases are of two different types of molecules: purines and pyrimidines. Purines have double  carbon-nitrogen ring(s) in their structure, and pyrimidines have single carbon-nitrogen ring(s) in their structure. 6. The two bases that are purines are Adenine and Guanine. These bases are comprised of double rings. 7. The two bases that are pyrimidines are Thymine and Cytosine. These bases are comprised of single rings. 8. Based on this information, scientists could predict that the base Adenine pairs with Thymine and the base Guanine pairs with Cytosine.

Adenine and guanine, which also appear in RNA, are the purines found in DNA. Cytosine and thymine are the pyrimidines found in DNA, while cytosine and uracil are found in RNA. Due to their two-ring structure, which pyrimidines lack, purines are bigger than pyrimidines.

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Full Question: These bases are of two different types of molecules: purines and pyrimidines. Purines have _______________________ ring(s) in their structure, and pyrimidines have _______________________ ring(s) in their structure. 6. The two bases that are purines are _____________________ and ________________________. These bases are comprised of ___________ rings. 7. The two bases that are pyrimidines _____________________ and ________________________. These bases are comprised of ___________ rings. 8. Based on this information, scientist could predict that the base _______________________ pairs with _______________________ and the base __

Your mother has just been diagnosed with hypertension and her doctor has recommended that she should make certain changes to her diet. Outline what her doctor might recommend that she: increases in her diet

Answers

A healthy eating program created to help treat or prevent high blood pressure is called the DASH diet (hypertension). Foods high in potassium, calcium, and magnesium are part of the DASH diet.

What is the diet to prevent hypertension?

Foods heavy in sodium, saturated fat, and added sugars are prohibited by the diet. Even a little decrease in sodium intake can help the heart and lower blood pressure by 5 to 6 mm Hg.

Different groups of people respond differently to sodium consumption in terms of blood pressure. Generally speaking, keep your daily sodium intake to 2,300 mg or fewer.

Therefore, the DASH diet is the most appropriate diet to prevent hypertension.

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what is convergent evolution definition

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Convergent evolution is the process by which unrelated species, living in similar environments, come to have similar characteristics over time.

It occurs because these species are adapting to similar conditions and thus independently develop similar traits as an adaptation. This is distinct from divergent evolution, which is when species adapt to different environments and thus develop different traits.

For example, the wings of bats and birds are an example of convergent evolution. Both animals have evolved the ability to fly, but their wings have different structures and are the result of different evolutionary pathways. Similarly, the streamlined bodies of dolphins and sharks are another example of convergent evolution, as both animals have evolved to be efficient swimmers in their aquatic environments.

Overall, convergent evolution is an important concept in the study of evolutionary biology, as it helps us understand how different organisms can evolve similar features in response to similar selective pressures.

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Since any single diploid organism only has two alleles per gene in their nuclear genetic material, the gene pool for a population of that organism can only have two alleles occurring in it.

Answers

Since diploid organisms always have two copies of each gene. If an organism has two copies of each chromosome and two copies of each gene, it is said to be diploid.

Why do genes have two alleles?

Diploid organisms contain two copies of each gene because they have two copies of each chromosome. Since there are several alleles of each gene, an organism may have two of the same allele or two different alleles of the same gene.

What is the term for having two alleles?

The person is homozygous for the allele if the two alleles are the same. The person is heterozygous if the alleles are distinct from one another.

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What are the 7 steps of meiosis?

Answers

Answer:

The 7 steps of meiosis are:Prophase I: The chromatin condenses into discrete chromosomes, and the nuclear envelope breaks down. Homologous chromosomes pair up and exchange genetic material in a process called crossing over.Metaphase I: The chromosomes align at the center of the cell, in preparation for separation.Anaphase I: The homologous chromosomes separate and move to opposite sides of the cell.Telophase I: A nuclear envelope reforms around each set of chromosomes, and a cleavage furrow forms, marking the division of the cytoplasm.Cytokinesis I: The cell physically divides, creating two haploid daughter cells.Prophase II: The chromosomes condense again, readying for their final separation.Metaphase II, Anaphase II, Telophase II, and Cytokinesis II: The chromosomes align and separate, and the cell physically divides again, creating four genetically distinct haploid daughter cells.Meiosis is a type of cell division that reduces the number of chromosomes by half, producing daughter cells with half the number of chromosomes as the original parent cell.

Explanation:

The correct sequence of embryonic development is
A) Blastula-morula-zygote-gastrula-embryo
B) Zygote-blastula-morula-gastrula-embryo
C) Zygote-morula-blastula-gastrula-embryo
D) Gastrula-morula-zygote-blastula-embryo

Answers

The correct sequence of embryonic development is 'zygote-morula-blastula-gastrula-embryo'.

What exactly do you mean by zygote?

A zygote is a single-celled organism that is the result of the fusion of two reproductive cells during fertilization. It is formed when a sperm cell successfully fertilizes an egg cell and the resulting cell is the first stage of a new organism.

Zygote: The zygote is the first stage in embryonic development that results from the union of a sperm and an egg.

Morula: The morula stage is the second stage of embryonic development. It is made up of 16 to 32 cells and has a hollow center.

Blastula: The blastula stage is the third stage of embryonic development. It is a hollow ball of cells, with a thin layer of cells on the outside and a fluid-filled cavity on the inside.

Gastrula: The gastrula stage is the fourth stage of embryonic development. It is a three-layered embryo that has formed from the blastula and consists of the ectoderm, mesoderm, and endoderm.

Embryo: The embryo is the fifth and final stage of embryonic development. It is a more developed version of the gastrula and is characterized by the development of certain organs and structures.

Hence, option C is correct.

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Imagine that a deaf male has a child with a hearing female. You know that the male must have the genotype dd, but the female could be either Dd or DD.
If the couple's first child has hearing, can you determine the mother’s genotype? (Hint: Draw Punnett squares for the two possible crosses.)
A. Her genotype must be DD.
B. Her genotype must be Dd.
C. Her genotype must be dd.
D. Her genotype cannot be determined.

Answers

We recognize that no child will be impacted by any of the scenarios. However, we are still unable to tell if the mom belongs DD or Dd. Therefore, it is impossible to ascertain her genotype.

With an example, define genotype.

A genotype rates whatever subtype of polymorphism that exists at a particular location in the genome. It can be represented symbolically. As just an example, BB, Bb, as well as bb may be used to indicate one certain nucleotide variant.

How can one determine their genotype?

Punnett squares can be used to identify a genotype. When working with a more advanced laboratory, you can make use of analytical methods like Pcr amplification and nucleotide recognition to determine individual genotypes that are present.

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Aseptic technique means that that you perform the preparation of media or the transfer
of living microbes___
a. uniformly and consistently
b. without introducing contamination
c. only with pathogens
d. under completely sterile conditions

Answers

Last but not least, while working in microorganisms, we need a way to transfer developing organisms,  from the a pure culture to the a sterile tube without adding any undesirable external pollutants.

What is the procedure for creating cultural media?

By continuously stirring and then heating, the desired amount the dehydrated medium and individual ingredients is dissolved in the distilled water (if necessary). Before heating, media containing gelatin should be sufficiently wet and properly agitated.

Why do we practise microbiology with aseptic technique?

Aseptic technique is used by microbiologists for a number of tasks, including transferring culture, inoculating media, isolating pure cultures, and running microbiological tests. By using proper aseptic technique, it is possible to protect cultures from contamination by environmental bacteria.

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which defensive strategy makes the insect hard to see?

Answers

Crypsis is an avoidance tactic.It's one of inscets' most effective defenses.To evade predators, they mimic the color of the leaf on which they are situated in this location.

What form of defense makes the bug difficult to see?

*Mimesis: By mimicking other objects in their surroundings, certain insects can "hidden in plain sight."*Mimicry: Insects primarily mimic in three different ways.When an insect that is not deadly mimics one that is, it is known as batesian mimicry.

What do insects do to defend themselves?

Detecting predators of intruders, avoiding predators by keeping a low profile, escaping, or scaring them away by attacking them are all examples of defensive behavior.

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name the microbe used in the production of citric acid

Answers

Answer: The microbe used in the production of citric acid is Aspergillus niger.

Explanation:

thickened regions of circular muscle that function like valves to control the flow of contents at various points in the GI tract, are called?

Answers

The thickened regions of circular muscle that function like valves to control the flow of contents at various points in the gastrointestinal (GI) tract are called sphincters.

What is muscle?

Muscle is a type of tissue that is found in many parts of the body and is responsible for producing movement and force. Muscles work together with bones, tendons, and ligaments to generate the movement of the body, including both voluntary and involuntary movements. There are three types of muscle tissue in the human body: skeletal muscle, smooth muscle, and cardiac muscle. Skeletal muscle is attached to bones and is responsible for voluntary movements, such as walking and running. Smooth muscle is found in the walls of organs and blood vessels and is responsible for involuntary movements, such as the contraction of the stomach during digestion. Cardiac muscle is found in the heart and is responsible for pumping blood throughout the body.

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What is difference between Caput Succedaneum and Cephalohematoma ?

Answers

At birth, caput succedaneum typically manifests as swelling (edema) on the top of the scalp. This swelling does transcend suture lines, makes the scalp feel spongy, and begins to subside shortly after birth.

Which condition—a caput succedaneum or a cephalohematoma—is more serious?

Both illnesses include consequences, such as infection and jaundice, however cephalohematomas may have more severe side effects than caput succedaneum.

What results in cephalohematoma and caput succedaneum?

When a doctor uses a vacuum, forceps, or another device to quicken the birth of the baby, both caput succedaneum and cephalohematoma might result. Jaundice can potentially result from either illness.

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what behavior do rats engage in while in a skinner box?

Answers

A Skinner box, sometimes referred to as an operant conditioning chamber, is a tool used to scientifically document an animal's behavior over a short period of time.

What is an illustration of operant conditioning with rats?

For instance, when a green light is present, lab rats who press a lever are rewarded with food pellets. When the red light is on, individuals experience a slight electric jolt when they pull the lever. As a result, individuals pick up the habit of pulling the lever during the green light and avoiding the red light.

What kind of behavior occurs when a rat pulls a lever to get food?

The rat initially accidentally pushed the lever a few times, but over time it came to associate pushing the lever with receiving food. An illustration of operant conditioning is this kind of learning.

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Are inner mass cells derived from the blastocyst? 03.9.For which of the following is potential energy DECREA SING? (Hint: Click here to see an overview of the ETC ) Protons moving from the mitochondrial matrix to the intermembrane space ADP gaining a phosphate group to become a molecule of ATP Two protons being moved closer toward each other Electrons moving from Complex IV to 02 PLS SOMONE HELP I KNOW THE PHOTO ISNT THAT GOOD BUT I REALLY NEED HELP I WILL MARK AS BRAINLIEST AND GIVE 5 STARS ASWELL AS A HEART PLSS What event was an invasion that failed miserably planned by president eisenhower and carried out by kennedy? [TRUE or FALSE] in value-chain analysis, value is measured by total revenue. What is definition of environmental resistance I CAN GRAPH INEQUALITIES ON THE NUMBER LINE.+x 6H15.5 > X rocks from which source would most likely contain the highest percentage of silicate minerals? pectinase is a protein that catalyzes the breakdown of pectic polysaccharides in plant cell walls. a researcher designs an experiment to investigate the effect of salinity on the ability of pectinase to lower the activation energy of the reaction involved. the design of the experiment is presented in table 1. for each test tube, the researcher will measure the amount of product formed over 20 minutes. table 1. an experiment to investigate the effect of salinity on pectinase function test tube sodium chloride concentration (molar) temperature (degrees c) substrate added pectinase added 1 0 23 yes no 2 0 23 yes yes 3 0.5 23 yes no 4 0.5 23 yes yes 5 1.0 23 yes no 6 1.0 23 yes yes 7 1.5 23 yes no 8 1.5 23 yes yes which of the following statements best helps justify the inclusion of test tube 5 in the experiment? A. responses it will act as a control for test tube 4 by showing the effect of the presence or absence of the substrate. B. it will act as a control for test tube 4 by showing the effect of the presence or absence of the substrate.C. it will act as a control for test tube 4 by showing the effect of a change in environmental temperature.D. it will act as a control for test tube 4 by showing the effect of a change in environmental temperature.E. it will act as a control for test tube 6 by showing the effect of the presence or absence of the enzyme.F. it will act as a control for test tube 6 by showing the effect of the presence or absence of the enzyme.G. it will act as a control for test tube 6 by showing the effect of a change in sodium chloride concentration. What is Queen Latifah most known for? In an electron transport chain, _____________ is captured from electrons as they are passed between proteins called electron carriers. write at least five characteristics of learning. Name the number system in which only the whole numbers less than 5 are used - What was the Sepoy Rebellion, and how did it change colonial India? identify the force that anthropologists of finance suggest is behind the global expansion of capitalism in the twenty-first century. Please help Find ethos pathos logos. African Americans had endured centuries of forced labor. This was followed by the struggle to do away with it. But, the end of enslavement did not bring equal treatment for Black people.Instead, white supremacy was quickly, legally and violently restored in the southern part of the United States. This is where 90 percent of African Americans lived.African Americans started to move to the North in great numbers around 1890. Eventually, hundreds of thousands of African Americans had moved from the rural South to the cities of the North.They had shared common experiences. But they didn't wallow in self-pity. They celebrated their own, new culture together. In the 1920s they created a new culture in New York City. This time period is known as the Harlem Renaissance.Seeking Better Lives Up NorthThe Great Migration from the South to the North began because of a "push" and a "pull."Black people had lived as enslaved laborers. But as free people, they faced segregation. Hate groups and hate crimes cast alarm among Black families of the Deep South. The promise of owning land had not materialized. Most Black people worked on farms, but did not make enough money and also had to pay rent to landowners. In the 1890s, insects damaged the cotton crops in the South, which made their lives even worse.All these reasons pushed Black Americans to seek better lives. Many hoped for a new life up in the North. There were many jobs because factory owners wanted people who would work for low pay.Unfortunately, northerners did not welcome Black Americans with open arms. White people treated Black people unfairly in the North, too.White workers complained that Black workers were lowering the pay for everyone. Most Black people found themselves segregated and living in run-down neighborhoods. The largest of these was Harlem, a neighborhood in New York City. Though it was poor, Harlem also had many educated people who made it a center for culture. imagine that your peer successfully synthesized fluorescein, then transfers an appropriate amount of it to a vial. however, instead of using 0.1 m naoh aq, your peer uses 0.1 m hcl(aq). 1A red die is tossed and then a green. die is tossed.What is the probability that the red die shows anumber larger than 4 or the green die shows anumber less than 2?The two events are not mutually exclusive. So to find theprobability of the union, use:P(A or B) = P(A) + P(B) - P(A and B)[?]P(A or B)=8P(B)Green dieWhat is the probability of the red die rolling aP(A)Red die+-8)P(B)P(A)Red die Green dienumber greater than 4?Enter your answer in simplest form.Enter Which component of the lymphatic systems consists of unencapsulated aggregates of lymphocytes within organs of the body?a. Lymphb. Lymphatic tissuesc. Lymphatic organsd. Lymphatic vessels what determines training intensity for weight training?A. Number of maximum lifts.B. Length of workout, maximum lifts and number of sets.C. Target zone.D. The amount of weight lifted and the number of repetitions and sets.