Answer:
The correct answer is A - natural selection. Natural selection is a process that grants survival advantages to certain individuals in a population, but does not lead to variations within a species. Variations are caused by mutation, sexual reproduction, and speciation, which are all processes involving genetic changes.
No copied answers pls i will mark brainly!
List any three important characteristics of a population and explain.
Answer:
A population is a collection of people belonging to the same species who are present in the same location at the same time and carry out common functions. For instance, the population of humans is made up of all the people who are present at a certain location and time.
A population's three most crucial traits are:(a) Birth rate: The ratio of live births to population is known as the birth rate. It is stated as the number of people added to the population as a percentage of the population as a whole.
(b) Death rate: This term refers to the ratio of deaths to population in a given area. It is referred to as the loss of individuals relative to population members.
(c) Age Distribution: This refers to the proportion of people in a population who are different ages. A population is made up of people who are present in different age groups at any one time. Age pyramids are a frequent way to visualize the pattern of age distribution.
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An organism that obtains energy and nutrients by feeding on another organism is called a:
Question 30 options:
cycler
producer
regulator
consumer
Answer: D- Consumer (or Heterotroph)
Hope this helps :)
Explanation:
When a system reaches equilibrium, the ______ of the forward and reverse reactions are equal and the ratio of the forward over the reverse ______ equals the equilibrium constant, K.
When a system reaches equilibrium, its forward and reverse reaction concentrations are equal, and its forward temperature over its reverse temperature ratio is equal to the equilibrium constant, K.
When a system approaches equilibrium, what happens to the forward and reverse reactions?The forward and reverse reactions are moving at the same speed when the system is in equilibrium. The amount of each reactant and product remains constant until equilibrium has been reached.
What causes the left shift in equilibrium?When a reactant's concentration is reduced, the equilibrium moves to the left, yielding fewer products. When a product's concentration falls, the equilibrium moves to the right, producing additional products as a result.
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A mother whose blood type is A, MN, Rh- has a child who tests AB, MN, Rh- . In a paternity test using these results, the following 5 fathers were genotyped. Which ones could be the father (check any and all that are possible)?Select one or more:a. I^A i, MN, rrb. none could be the fatherc. ii, NN, rrd. I^A I^A, MN, RRe. ii, MM, rrf. I^Bi, MN, RR
The only possible father is d. I^A I^A, MN, RR, as he is the only one with a blood type that is compatible with the mother's blood type and the child's blood type.
Blood type is determined by the combination of antigens (proteins or carbohydrates) found on the surface of red blood cells. The most important blood type antigens are the ABO antigens and the Rh factor. The ABO antigens determine if someone has blood type A, B, AB, or O, while the Rh factor determines if someone is Rh-negative or Rh-positive.
A person's blood type is determined by their genetic code, specifically the combination of alleles (versions of a gene) they inherit from their parents. For example, the gene that determines ABO blood type has three alleles: I^A, I^B, and i. I^A codes for the A antigen, I^B codes for the B antigen, and i codes for no antigens. When a person inherits one I^A allele and one I^B allele, they have AB blood type.
The child's blood type AB, MN, Rh- can only be produced if one parent has type A (I^A I^A or I^A i) and the other parent has type B (I^B I^B or I^B i). The mother's blood type is A, MN, Rh-, which is the I^A I^A type. The father's blood type must therefore be B, MN, Rh- or AB, MN, Rh- (I^B I^B or I^B i, or I^A I^B).
Out of the five possible fathers, the only one with blood type B, MN, Rh- or AB, MN, Rh- is d. I^A I^A, MN, RR. This father could be the biological father, as he has type A blood, which combined with the mother's type A blood could produce a child with AB blood.
In conclusion, the only possible father is d. I^A I^A, MN, RR, as he is the only one with a blood type that is compatible with the mother's blood type and the child's blood type.
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which of the following is a property of a reversible cholinesterase inhibitor? group of answer choices
The property of reversible cholinesterase inhibitor is: (1) that it enables parasympathetic stimulation for a finite period of time.
Cholinesterase inhibitor is a group of chemical compound that breaks down the neurotransmitter acetylcholine. They perform there function by binding to the enzyme cholinesterase. The examples are donepezil, galantamine, rivastigmine, etc.
Parasympathetic stimulation is the activation of the body's mechanism of bringing down the body to its normal condition like the lowering of the elevated heart rate. This is done by the stimulation of the M2 receptors present in the muscle cells of the body, particularly the cardiac and the smooth muscles.
The given question is incomplete, the complete question is:
Which of the following is a property of a reversible cholinesterase inhibitor? group of answer choices
that it enables parasympathetic stimulation for a finite period of time. that it enables sympathetic stimulation for a finite period of time.that it enables parasympathetic stimulation permanently. that it enables both parasympathetic and sympathetic stimulation.To know more about cholinesterase inhibitor, here
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Which of the following is NOT a concept of anatomy?
Answer:
Structure is the answer
When you push down on a block resting on a table, block atoms and table atoms that are in contact with one another.
When you push down on a block resting on a table, the atoms of the block and the atoms of the table that are in contact with each other and get interact through intermolecular forces.
In general , forces that include van der Waals forces, hydrogen bonding, will helps the atoms to repel from each other. Hence, When you push down upon a block, you are applying an external force to it , that will cause the atoms at the surface of the block to compress slightly.
The compression will then results to an increase in the contact force between the block and the table, that as a result will prevents the block from moving downward further. Hence , the force lying between the atoms at the surface of the block and the force at the atoms in table get balanced, and the block remains stationary.
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Drag each tile to the correct box. Not all tiles will be used.
The rocks present in western Africa
and eastern South America formed
at the same place and at the
same time.
One statement is an example of a scientific observation. Another statement is an example of a scientific explanation. Identify the correct statement
for each category to illustrate how scientific explanations are inferred from scientific observations.
Even if modern organisms are
found in ancient portions of the
fossil record, this wouldn't challenge
the theory of evolution in any way.
The cloning of organisms is an
exciting area of study, and more
resources should be be devoted
to it.
Scientific Observation
The age, type, and composition of
ancient rocks in western Africa are
nearly identical to the age, type,
and composition of rocks in
eastern South America.
Cloning has the potential to
significantly benefit a great many
people, so it should not be
considered immoral or risky.
mit Test
A scientist thinks that he might
find serious inconsistencies in the
fossil record if he conducts an
excavation in a new location.
Reader Tools
Scientific Explanation
The age, type, and composition of ancient rocks in western Africa are nearly identical to the age, type, and composition of rocks in eastern South America.
Scientific Explanation:The rocks present in western Africa and eastern South America formed at the same place and at the same time.
What is scientic observation?A scientific observation is a statement about an event, phenomenon, or pattern that can be directly observed or measured. It is based on empirical evidence and is often made using scientific tools and techniques.
The observation about the age, type, and composition of ancient rocks in western Africa and eastern South America being nearly identical is an example of a scientific observation.
What is Scientific explanation?A scientific explanation, on the other hand, is a statement about why or how something happens. It is based on a series of observations and is developed through scientific investigation and reasoning.
The explanation that the rocks in western Africa and eastern South America formed at the same place and at the same time is an example of a scientific explanation. This explanation is inferred from the scientific observation that the age, type, and composition of the rocks are nearly identical.
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If you were a regulatory official, what kind of information would you require to make
a decision about whether a certain chemical was "safe" or not? What level of risk
would you deem acceptable for society?
Chemical structure and properties, Toxicity data, Exposure data and Risk assessment are the kinds of information required by the regulatory officers to decide whether certain chemical is safe or not.
How to consider chemical safety?
Chemical structure and properties: The chemical composition, molecular structure, and physical properties of a chemical to understand its potential effects on human health and the environment.
Toxicity data: Toxicity of a chemical has to be understood, including its acute and chronic effects, its potential to cause cancer, birth defects, and other harmful health effects.
Exposure data: knowing how the chemical is used, how people are exposed to it, and in what quantities. Consider the exposure of wildlife and the environment to the chemical.
Risk assessment: Use the information gathered to perform a risk assessment, which considers the potential harm from exposure to the chemical and the likelihood of that harm occurring.
In terms of what level of risk would be deemed acceptable for society, it is important to note that different countries and organizations may have different approaches and criteria for assessing risk.
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Intercellular communication involves a _____.
a. signaling molecule and a signal-receiving chemical
b. signaling molecule, a transducer molecule and a signal-receiving molecule
c. transducer and a signaling molecule
d. signaling molecule and a transducer molecule
e. signaling molecule, a nerve net and a signal-receiving molecule
Intercellular communication involves a signaling molecule, a transducer molecule and a signal-receiving molecule, option B.
How does intercellular communication work?Intercellular communication refers to the process by which cells in a tissue or organism exchange signals and information to coordinate their activities and behavior. This communication can occur through direct cell-to-cell contact, release of signaling molecules into the extracellular space, or through the use of specialized cell surface receptors.
The aim of intercellular communication is to maintain homeostasis and coordinate complex physiological processes such as growth, differentiation, and response to stimuli. It is the mechanism of intercellular protein transfer between immune cells, as well as its immunological significance.
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Would a baby elephant be more likely to look like its parent or to look like one of its great-great-great-grandparents?
Explain your reasoning.
Answer: il aura plus de chance de ressembler a ses parents
Explanation: Car il a ete crée grace aux genes de la mere et du pere il n'as donc qu'une partie du sang de ses grands parents
Answer: Its parent
Explanation: Throughout generations the genetic features of ancestors become less prevalent due to the percentage of their genes decreasing as a result of breeding with other elephants unrelated to their ancestors.
it's like 5 AM writing this feel free to tidy it if needed
Observations of Trident gum?
Observations of Bazooka gum?
Trident gum and bazooka gum are the two popular sugar-free chewing gum brands. These are top american brands of chewing gums.
What is Trident gum and Bazooka gum?Trident is a popular brand of sugar-free chewing gum. Trident was originally introduced by the American Chicle shortly before it was bought by Warner-Lambert in the year 1962, however it did not reach the UK until the year 2007 when it was introduced by the then-owner Cadbury Schweppes in the United Kingdom. Trident is branded as Stimorol gum and it is generally the same as Trident.
Bazooka is an American brand of the bubble gums which was introduced in the year 1947. It is a product of the Bazooka Candy Brands and it was a division of The Topps Company Inc. until that the company's acquisition by Fanatics, Inc. in 2022.
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1) From the list below, select all the structures that would be found in both gram-positive and gram-negative cells. select all that apply. question 25 options:a) teichoic acidb) peptidoglycanc) outer membraned) capsulee) 70s ribosomes
The structure that would be found in both gram-positive and gram-negative cells is peptidoglycan (option B)
The peptidoglycan cell wall that encloses gram-negative bacteria is surrounded by a lipopolysaccharide-rich outer membrane. Gram-positive bacteria have much thicker layers of peptidoglycan than Gram-negative bacteria, which have an outer membrane.
Both Gram-positive and Gram-negative bacteria have peptidoglycans in their cell walls, which give the cells their distinctive shapes and mechanical protection. Peptidoglycans are only found in prokaryotic organisms and are made up of peptide chains that are either minimally cross-linked in Gram-negative bacteria or strongly cross-linked with bridges in Gram-positive bacteria (such as Staphylococcus aureus) (e.g., Escherichia coli). The b-lactam antibiotics have as one of their targets the cross-linking transpeptidase enzymes.
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what kinds of materials do not conduct heat well
Answer:Wood, lead, and non metal are not good conductors of heat.
Explanation:
Poor conductors are any material that does not conduct electricity, heat or both very well and are generally known as insulators. Air is also an example of an insulator.
Wood, lead, and non metal are not good conductors of heat. Poor conductors are any material that does not conduct electricity, heat or both very well and are generally known as insulators. Air is also an example of an insulator.
The plasma membrane is semipermeable because____.
A. Phospholipids let through both polar and nonpolar substances.
B. Proteins in the membrane act like gates to control the entrance and exit of molecules.
C.cholesterol makes the membrane too rigid to let small molecules through.
D. Moving materials through the membrane always requires the use of ATP
'The plasma membrane is semipermeable because B. Proteins in the membrane act like gates to control the entrance and exit of molecules.
What does the plasma membrane as a selectively semi-permeable barrier mean?The expression the plasma membrane as a selectively semi-permeable barrier indicates that this barrier allows the entry and exit of certain molecules which is due to the presence of proteins that make this work.
Therefore, with this data, we can see that the plasma membrane is a selectively semi-permeable barrier that can allow the in and put of specific molecules in the cell.
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cells of the small intestine and kidney tubule have a region composed of , which are cell extensions that increase surface area.
Cells of the small intestine and kidney tubule have a region brush border composed of microvilli, which are cell extensions that increase surface area.
What is meant by microvilli?Microvilli on the surface of epithelial cells such as those lining the intestine increases surface area of the cell and thus facilitate absorption of ingested food and water molecules.
Microvilli is found in tightly packed arrays on the apical surfaces of polarized epithelial cells. It increase surface area of the cell exposed to the lumen to enhance absorption and secretion.
Microvilli are the finger-shaped plasma membrane protrusions that are found at surface of large variety of cell types but are most numerous and elaborated on simple epithelial.
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When competition increases, which of the following will likely increase? Explain why.
A.
survival
B.
evolutionary change
C.
mutation rate
D.
rate of reproduction
Answer:
B. Evolutionary change is likely to increase when competition increases. This is because when competition increases, organisms must adapt and evolve in order to survive. Natural selection will favor those organisms who are best suited to the environment and this will drive evolutionary change.
which of the following is the study of tissues and groups of specialized cells and cell products that work together to perform specific functions?
The study of tissues and groups of specialized cells and cell products that work together to perform specific functions is called as A)cytology. So, correct option is A.
Cytology is the study of cells. Cytology is that part of life science, which manages the investigation of cells regarding design, capability and science. Robert Hooke is at times seen as the dad of cytology. In view of utilization it can allude to: Cytopathology: the investigation of cell sickness and the utilization of cell changes for the finding of illness. Cell science: the investigation of cell life structures, capability and science. The Global Foundation of Cytology has as its true diary Acta Cytologica.
The cells to be inspected might be taken through the accompanying strategies:
Scratching or brushing the tissue surface, for example, during a pap smearGathering body liquids, such for pee or respiratory mucusFine-needle yearnings. This is eliminating cells by drawing them through a fine needle, like stomach liquid in ascites, pleural liquid from the lungs, or cerebrospinal liquid from the spinal trench.Different sorts of tissue biopsyCytology is unique in relation to histology. Cytology by and large includes taking a gander at a solitary cell type. Histology is the test of a whole block of tissue.
Hence,correct option is A.
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(Complete question) is:
Which of the following is the study of tissues and groups of specialized cells and cell products that work together to perform specific functions?
A) cytology
B) anatomy
C) histology
D) physiology
E) embryology
4. List the main functions that proteins have in the body. Include an example of a protein molecule that performs this function where possible.
Your body's tissues may be repaired and built up using protein. It triggers metabolic processes, preserves fluid and pH equilibrium, and supports a robust immune system.
What happens if you eat too much protein?A surplus of peptides is frequently excreted, but a surplus of protein is generally stored as fat. Over time, this might lead to weight gain, notably if you try to increase your protein intake while overeating.
What transpires if your body is deficient in protein?A serious protein deficiency can impair children's development, cause fatty liver and skin, cause emphysema, and exacerbate infections. Although a true deficit is rare in wealthy countries, a low intake can cause muscle atrophy and an elevated risk of fractures.
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the waist-circumference-to-height formula suggests that a male who is six feet tall (72 inches) should have a waist circumference of no more than 32 inches.
The given statement "The waist-circumference-to-height formula suggests that a male who is six feet tall (72 inches) should have a waist circumference of no more than 32 inches." is false the ratio is basically the circumference of the waist divided by height.
A person's waist-to-height ratio which is also represented as WHtR or also known as the waist-to-stature ratio or WSR, is basically defined as their waist circumference which is divided by their height. Both of these are measured using the same units.
This ratio can be used in order to predict obesity-related cardiovascular disease. The WHtR is can be basically defined as measure of how the body fat is distributed. The higher is the values of WHtR, the higher will be the risk of obesity or any other related cardiovascular diseases.
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2. Pea plants can have yellow (Y) or green (y) peas. They can also have round (R) or wrinkled (r) pea pods.
Cross pea plants heterozygous for both traits.
a. List the genotypes of the parent plants (P1 generation).
b. List the gametes from the parent plants that were created by meiosis.
c. List the possible phenotypes of the offspring.
d. What is the phenotypic ratio?
I don’t get this at all. Pls help!!!
The right response is (a) Both the green wrinkled and the yellow round letters stood for YYRR.
What distinguishes dominant and recessive alleles?Based on how they influence organisms heterozygous for two different alleles, alleles are categorized as dominant or recessive. The recessive allele, which is not visible in the phenotype of heterozygotes, is "dominated" in heterozygotes by the dominant allele, which influences the phenotype.
Two recessive phenotypes are present in the green, wrinkled parent, indicating homozygosity for both the pea hue and pea shape alleles. This is consistent with the yyrr genotype. Two dominant phenotypes are present in the round, yellow parent, and both genes must have at least one dominant allele. Any of the genotypes YYRR, YYRr, YyRR, or YyRr could be this. However, only option (a) accurately identifies the genotype of the parent who is green and wrinkled among the choices (a) and (b) that reflect potential genotypes for this parent. As a result, option (a) is the right one.
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Full Question = In pea plants, yellow peas (Y) are dominant to green (y) and round peas (R) are dominant to wrinkled (r). Two pea plants were crossed, one with yellow round peas and one with green wrinkled peas. What were the genotypes of the parents?
a. The yellow round was YYRR and the green wrinkled was yyrr.
b. The yellow round was YyRr and the green wrinkled was YyRr.
c. The yellow round was yyrr and the green wrinkled was YYRR.
d. The yellow round was YYrr and the green wrinkled was yyRR.
Alexander is working with plants in the laboratory. In his experiment, he takes seeds from one plant and puts them in soils of different acidity. He keeps them in the same location and provides 50 milliliters (mL) of water each day. He plans to observe how many seedlings sprout from the seeds. What is the independent variable in this experiment?
Explanation:
The independent variable in the Alexander's experiment is the acidity of the soil.
________is a condition in which food is being consumed but the intake of the food is not nutritionally adequate. group of answer choices sufficient nutrition undernutrition compliant nutrition overnutrition
Malnutrition, a serious condition, happens when your diet lacks the essential nutrients. It means having "bad nutrition," which includes not getting enough food and undernutrition.
What is an illustration of undernourishment?People with undernutrition frequently exhibit symptoms such as underweight, protruding bones, dry, elastic skin, and hair that is easy to lose. Usually, a doctor can identify undernutrition based on a patient's appearance, height, weight, and circumstances.
What is the phrase for hunger?Starvation is characterized by a large caloric energy intake deficiency below what is necessary to maintain an organism's life. It is the most severe kind of malnutrition. Humans who experience prolonged hunger may pass away or suffer permanent organ damage. The symptoms and effects of malnutrition are referred to as "inanition."
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True or False? The following is an example of scarcity. Each lake has a limited number of fish living in it. As the number of fishermen who fish at the lake increases beyond a certain point, we see the fish population start to decline.
The statement " As the number of fishermen who fish at the lake increases beyond a certain point, we see the fish population start to decline" is true because A finite number of fish can be found in each lake.
There are only a certain number of fish that can be found in each lake. If the number of fishermen that fish at the lake continues to climb above a certain point, the lake's fish population will begin to see drop.
Because there are a limited number of fish in each lake, the statement that "As the number of fishermen who fish at the lake increases beyond a certain point, we see the fish population start to decline" is accurate. This is due to the fact that the number of fishermen who fish at the lake can only reach a certain point.
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FILL IN THE BLANK. ___ is the sequence of nucleotides along the length of a dna strand resirtcted by the base pairing rules
DNA sequence is the sequence of nucleotides along the length of DNA strand restricted by the base pairing rules.
What is DNA sequence?DNA molecule is made up of sequence of nucleotides and base pairing rules dictate which nucleotides can bond together to form double-stranded structure of DNA. Sequence of nucleotides along length of DNA strand as restricted by the base pairing rules is called DNA sequence.
Each strand is made up of sequence of four nucleotides, A, C, G, and T. and the order of nucleotide sequence encodes genetic information. As the nucleotides pair in a predictable way, that is A with T, and C with G, each strand of DNA is always complementary to the other.
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skin cells are examples of what type of stem cells
Answer:
tomer
Explanation:
hello I am Abhishek sir from jharkhand
mature bone cells that maintain and monitor the protein and mineral content of the surrounding matrix are called: a. osteoprogenitor cells b. osteocytes c. osteoclasts d. osteoblasts e. flag
Mature bone cells that maintain and monitor the protein and mineral content of the surrounding matrix is osteocytes (b).
Bone is a mineralized connective tissue that perform important functions in the body, such as locomotion, protects the vital organs, as a mineral reservoir for calcium homeostasis and consisting of bone marrow. There are four types of cells: osteoblasts, osteocytes, osteoclasts and osteoprogenitor cells.
Osteoblasts responsible on matrix synthesis and synthesize the components that constitute the extracellular matrix of bone. These include structural macromolecules, such as type I collagen as well as numerous proteoglycans, non-collagenous proteins. Osteoblasts also promote mineralization.Osteoclasts dissolve bone. It performs roles on bone resorption.Osteocytes are the most abundant cells in bone. It acts as mechanosensors (can sense pressures or cracks in the bone), directing osteoclasts where and when to dissolve bone and osteoblasts where and when to form it. Osteocytes also regulate mineral homeostasis. They uptake of minerals from the blood directly and release of minerals back into the blood as needed.Osteoprogenitor cells, are stem cells in the bone that play a role in bone repair and growth. These cells are the precursors to the more specialized bone cells (osteocytes and osteoblasts) and reside in the bone marrow.Thus, maintaining and monitoring the protein and mineral bones are done by osteocyte.
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Put the events in order that they would occur in a classic model of adaptive radiation on island archipelagos beginning with the earliest event at the top.A) a new species colonize other islandsB) speciation occurs allopatricallyC) a species colonizes multiple islands in an archipelagoD) the islands contain local communities of two or more species.
An ecological opportunity or a new adaptive zone is regarded to be the catalyst for adaptive radiations. Ecological opportunities may result from the extinction of competitors or predators.
What is the first event that must take place for speciation to take place?Two new populations must develop from one original population in order for speciation to take place, and they must evolve in such a way that it is difficult for members of the two new populations to interbreed.
What types of circumstances can cause a species to adapt and become more numerous?An ecological opportunity or a new adaptive zone is regarded to be the catalyst for adaptive radiations. The development of a significant innovation, or dispersal to a new environment.
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John Needham's experiment was clever and well accepted by the scientific community during his time because ______.
a. his method of "cooking" the broths was how they normally cooked during that time.
b. he used a cork and broth, items that most people used, so they trusted him.
c. he was a leader in his community and people trusted everything he said.
John Needham's experiment was clever and well accepted by the scientific community during his time because he used a cork and broth, items that most people used, so they trusted him.
The correct option is option b.
John Turberville Needham was an English biologist who conducted experiments to prove spontaneous generation. He performed his experiments with gravy and then later, he performed his experiments in tainted wheat, inside containers.
These experiments were done to prove spontaneous generation. His experiments basically consisted of boiling a particular broth mixture briefly and then cooling this mixture in an open container to the room temperature. Then the flasks were be sealed, and the growth of microbes was observed over a few days.
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explain what is misleading in terms of dna synthesis direction in the cartoon of dna replication on the right.
The cartoon of DNA replication on the right appears to show the direction of DNA synthesis as proceeding from the bottom to the top.
What is DNA?DNA, or deoxyribonucleic acid, is a molecule that carries the genetic instructions used in the growth, development, and functioning of all living organisms. DNA is made up of two strands of nucleotides, which are made up of four nitrogen-containing bases: adenine (A), guanine (G), cytosine (C), and thymine (T). These base pairs are arranged in a unique sequence that contains the instructions for the development and functioning of an organism. DNA is found in the nucleus of all cells, and it is passed from generation to generation. It is responsible for the inherited traits of an organism, and it can be used to trace the evolutionary history of a species.
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