During the sixteenth century, the bird has vanished. East of Madagascar in the Indian Ocean is the island of Mauritius, where the dodo (Raphus cucullatus) is endemic. The Rodrigues solitaire, which is also extinct, was the dodo's closest genetic relative.
The dodo bird lived on the island of Mauritius in the Indian Ocean for so long without being disturbed that it no longer required or had the capacity to fly. It inhabited the ground, built its nest there, and fed on fruits that had fallen from trees. There were no mammals on the island, but the deep trees were home to a wide variety of bird species.
The Portuguese arrived on Mauritius for the first time in 1505. Ships involved in the spice trade soon began to stop by the island. The dodo bird, which might weigh up to 50 pounds, provided the sailors with a welcome source of fresh meat. For food, a great deal of dodo birds were killed.
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a student completes a pet experiment using chloroplasts from leaves lacking pigments that absorb in the 550 nm to 600 nm wavelength range. which color of light should they avoid in their experiment if they want to measure activity at different wavelengths?
a. Blue
b. Orange
c. Yellow
d. Red
e. violet
The learner should refrain from utilizing yellow light, because it has a wavelength of about 550–580 nm and won't be received at all since it lacks the pigment needed to do so.
What is the purpose of a chloroplast?Plant development and crop productivity are supported by the energy that chloroplasts create through sunshine and oxygen-release mechanisms. Therefore, chloroplasts are in charge of producing active substances such essential nutrients, auxin, nucleotides, enzymes, lipids, and natural compounds.
Simple definition of chloroplast?Chloroplasts, an organelle present in plant cells, convert sunlight into surprisingly strong carbon - carbon energy through the photosynthetic process. They do this to keep life on Earth going. Chloroplasts support several metabolic activities in plant cells, including the synthesis of biological membranes and unsaturated fats.
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why are individual chromosomes visible only during mitosis
When cells divide, or go through mitosis, the chromosomes are significantly compressed and become visible as distinct, black objects inside the cell nuclei.
What is a cell?Biologically speaking, the smallest unit that can support life on its own and makes up all living things, including the tissues of the body. The three main parts of a cell are the cytoplasm, nucleus, and cell membrane. The cell membrane keeps chemicals within and outside of the cell under control.
Who Defined a cell?Robert Hooke stumbled upon the cell in 1665. Robert Hooke examined a piece of bottle cork under a compound microscope and discovered tiny structures that resembled little dwellings. He therefore referred to these "rooms" as cells.
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Scientists are testing the effect of different scrubber technologies on the removal of pollutants from coal power plants. The scrubbers use a slurry of limestone and water.
The effectiveness of various scrubber devices in removing pollutants from coal-fired power plants is being studied by scientists. The scrubbers work with sludge.
What exactly is power?Horse (hp), which is roughly equivalent to 745.7 watts, is a unit of measurement sometimes used to describe the power of motorized vehicles as well as other devices. Keep in mind that current is the pace at which electric fields pass through a conductor, whereas voltage is the particular effort (or energy stored) per unit charge.
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what cellular process uses glucose and oxygen to produce atp?
The process through which the glucose in the food you eat is transformed into ATP, and subsequently into energy, is known as cellular respiration. Both glucose and oxygen are reactants in cellular respiration.
What two biological mechanisms convert glucose into ATP?All living things, both heterotrophs and autotrophs, have breathing cells. To create ATP, they all metabolise glucose. Cellular respiration is made up of three processes: electron transport, glycolysis, and the Krebs cycle, also called the citric acid cycle.
What process converts glucose into ATP?From glucose and oxygen, aerobic respiration creates ATP, as well as carbon dioxide and water. Chemicals other than oxygen are used during anaerobic respiration, which is predominantly employed by bacteria and archaea.
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Based on their shape, the bones of the Cranium can be classified as what type of bone?
a. flat bones
b. long bones
c. irregular bones
d. short bones
a. flat bones. The bones of the Cranium are flat bones based on their shape.
Flat bones are thin and have a broad surface that provides protection and a place for muscle attachment.
The bones of the Cranium, or skull, are flat bones that protect the brain and other organs of the head. The flat shape of these bones provides a large surface area for muscle attachment, allowing for precise movements of the head and face. In contrast, long bones are longer than they are wide, and are found in the arms, legs, and fingers. Irregular bones have complex shapes and are found in the spine and face, while short bones are cube-shaped and are found in the wrist and ankle.
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________. also known as the horizontal plane, is the plane that divides the body into an upper and lower portion.
The plane that divides the body into an upper and lower portion is called the transverse plane. This plane is also known as the horizontal plane, and it runs perpendicular to the sagittal and coronal planes.
The transverse plane divides the body into superior and inferior portions, with the superior portion being above the plane and the inferior portion being below it.
The transverse plane is important in medicine and anatomy, as it is often used to visualize and analyze cross-sectional images of organs and structures within the body. Techniques such as computed tomography (CT) and magnetic resonance imaging (MRI) utilize the transverse plane to produce detailed images of the body in cross-section.
In addition, the transverse plane is useful in surgical procedures that involve the abdomen or pelvis, as it allows for access to the organs and structures in the lower portion of the body.
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what records the arrival times of the P and S waves in order to determine the location of an earthquake’s epicenter
A-magnitude
B-epicenter
C-seismogram
D-the Richter scale
Instruments known as seismometers are used to measure and record the ground motions brought on by seismic waves, which are generated during earthquakes or by other causes of ground motion.
What is recorded on a seismograph?Tools called seismographs are used to record earthquake ground motion. They are buried all over the planet and function as a seismographic network.
What is measured by the Richter scale?Several magnitude scales measure various aspects of the earthquake, but the Richter scale measures the biggest wobble (amplitude) on the recording. Currently, the USGS uses the Moment Magnitude scale to report earthquake magnitudes, however many different magnitudes can be calculated for comparison and research.
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which of these dinosaurs is classified as a carnivore? a) Albertosaurus. b) Allosaurus. c) Archaeopteryx. d) Baryonyx. e) Carnotaurus. f) Coelophysis. g) Dilophosaurus. h) Giganotosaurus. i) Mapusaurus. j) Mosasaurus.
The dinosaurs classified as carnivores are: Albertosaurus, Allosaurus, Baryonyx, Carnotaurus, Dilophosaurus, Giganotosaurus, Mapusaurus, and Mosasaurus.
Albertosaurus is a genus of tyrannosaurid theropod dinosaurs that lived in western North America during the Late Cretaceous Period, about 71 million years ago.
Allosaurus is a genus of large carnosaurian theropod dinosaur that lived 155 to 145 million years ago during the Late Jurassic epoch.
Baryonyx is a genus of theropod dinosaur which lived in the Barremian stage of the Early Cretaceous period, about 130–125 million years ago.
Carnotaurus is a genus of theropod dinosaur that lived in South America during the Late Cretaceous period, probably sometime between 71 and 69 million years ago.
Dilophosaurus is a genus of theropod dinosaurs that lived in what is now North America during the Early Jurassic, about 193 million years ago.
Giganotosaurus is a genus of theropod dinosaur that lived in what is now Argentina, during the early Cenomanian age of the Late Cretaceous period, approximately 99.6 to 95 million years ago.
Mapusaurus was a giant carcharodontosaurid carnosaurian dinosaur from the early Late Cretaceous, approximately 93.9 to 89.6 million years ago, of what is now Argentina.
Mosasaurus is the type genus of the mosasaurs, an extinct group of aquatic squamate reptiles. It lived from about 82 to 66 million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous.
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which of the following is dna most similar to?explain your answer in the space below
The DNA of humans is mostly similar to chimpanzees. The correct option is A.
What is DNA?DNA is the genetic material of living organisms. It is made up of nucleotides, and it is present inside the nucleus of the cell. DNA makes up the genotype and phenotype of an organism, and it is different in every organism.
Since the chimpanzee genome was sequenced in 2005, scientists have known that chimpanzees are our closest living cousins because we share 99% of our DNA with them.
Therefore, the correct option is A. Chimpanzee.
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Chimpanzee
oranguton
dolphin
gorilla
All of the following are true of epidermal ridges, except that they? * interconnect with the dermal papillae* cause ridge patterns on the surface skin* produce patterns that are genetically determined* extend to the dermis* contain increased numbers of free nerve endings
All of the following statements are true about epidermal ridges, except that they "extend to the dermis."
What are epidermal ridges?Epidermal ridges are raised areas of the skin that create patterns on the surface of the fingers, palms, and soles of the feet.
These ridges form interconnected loops with the dermal papillae, which are the small, nipple-like projections of the dermis. The patterns produced by epidermal ridges are genetically determined and unique to each individual, making them useful for fingerprint identification.
Also, epidermal ridges contain increased numbers of free nerve endings, making the skin in these areas more sensitive to touch. However, epidermal ridges do not extend into the dermis; they are only present in the outermost layer of skin, the epidermis.
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estimate the osmolarity of the potato tuber tissue
The osmolarity of potato tuber tissue can vary depending on various factors such as the potato variety, the stage of growth, and environmental conditions. However, the typical osmolarity range for potato tuber tissue is approximately 0.2 to 0.5 osmol/L.
It is important to note that the osmolarity of potato tuber tissue can also be affected by the method used to measure it. Therefore, the actual osmolarity value may vary depending on the experimental procedure used.
In order to get a more accurate estimate of the osmolarity of potato tuber tissue, it is recommended to perform experimental measurements using a reliable method such as freezing point depression or vapor pressure osmometry.
Overall, The estimate osmolarity of the potato tuber tissue is approximately 0.2 to 0.5 osmol/L.
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Many bacterial cell structures act as virulence factors. Virulence factors are characteristics of an organism that enhance its ability to cause disease. Predict which cellular structure(s) may act as a virulence factor.
- S-layer
- mycolic acid
- fimria
- LPS
- pili
- capsule
Since it enables bacterial cells to evade lung phagocytes, the capsule is a pathogen's most crucial determinant of virulence.
Factors Affecting Adherence: Many pathogenic bacteria attach to cells via their pili (fimbriae) in order to colonise mucosal locations. Elements of Virulence that Encourage Colonization: The capacity to connect host cells and spread inside a host by using motility and other methods. The capacity to cling to host tissues and withstand removal physically a capacity to enter host cells. The capacity to compete for nutrients like iron. A gram-positive infection called Streptococcus pneumonia (S. pneumoniae) is the main contributor to bacterial encephalopathy in the undeveloped nations.
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A water biome includes waters that are flowing quickly downhill. The water has very little salt. Photosynthetic organisms grow
where there is sunlight. Plankton is an important food source. Which characteristic identifies this biome as either freshwater or marine?
A. plankton are a food source
B. Photosynthetic organisms
C. water with very little salt
Water with very little salt identifies this biome as either freshwater or marine. Therefore, option (C) is the correct answer.
What is a water biome?A water biome is a type of ecosystem that is dominated by bodies of water, such as oceans, lakes, rivers, and wetlands. These biomes are home to a diverse range of flora and fauna, including fish, crustaceans, mollusks, amphibians, reptiles, birds, and mammals. Water biomes are influenced by factors such as temperature, salinity, and currents, and can be divided into subcategories based on their physical and biological characteristics.
They play a crucial role in the Earth's climate, carbon cycle, and biodiversity, and are subject to threats from pollution, overfishing, and climate change.
Therefore, option (C) is the correct.
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What molecules make up chromosomes?
In the nucleus of each cell, the DNA molecule is packaged into thread-like arrangements called chromosomes. Each chromosome is made up of DNA tightly coiled multiple times around proteins called histones that support its structure.
Chromosomes are not observable in the cell's nucleus - not even under a microscope - when the cell is not dividing. Nevertheless, the DNA that makes up chromosomes comes to be more tightly packed during cell division and is then observable under a microscope. Largely of what researchers know about chromosomes was understood by observing chromosomes during cell division. Each chromosome has a constriction point named the centromere, which splits the chromosomes into two divisions, or arms.
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which thermometer is used to measure surface temperatures?
Surface temperatures are measured using infrared thermometers.
Infrared thermometers are commonly used to measure surface temperatures as they can quickly and accurately measure temperature without making contact with the surface
There are several types of thermometers that can be used to measure surface temperatures, but the most commonly used type is an infrared thermometer, also known as a non-contact thermometer or a pyrometer.
Infrared thermometers measure the temperature of a surface by detecting the infrared radiation emitted from it. They work by measuring the amount of infrared radiation that is emitted by the surface and converting that measurement into a temperature reading. The advantage of using an infrared thermometer is that it does not need to make contact with the surface being measured, which means it can be used to measure the temperature of objects that are difficult to reach or that are in motion, such as moving machinery or food on a hot grill. Infrared thermometers are also fast, accurate, and easy to use, making them a popular choice for a wide range of applications, from industrial and scientific settings to home use.
In addition to infrared thermometers, there are other types of thermometers that can be used to measure surface temperatures. For example, contact thermometers, such as thermocouples and resistance temperature detectors (RTDs), can be used to measure the temperature of a surface by making physical contact with it. These types of thermometers are often used in laboratory and industrial settings where high accuracy is required. However, they may not be suitable for measuring the temperature of surfaces that are difficult to reach or that are in motion.
Overall, the choice of thermometer for measuring surface temperatures will depend on the specific application, the accuracy and precision required, and the temperature range being measured. In many cases, an infrared thermometer will be the most convenient and practical choice, but in other cases, a contact thermometer may be more appropriate.
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Abundant plant material accumulating in a swampy environment with __________ is required for peat to form.
Abundant plant material accumulating in a swampy environment with low oxygen level is required for peat to form.
It takes a lot of plant material to build up in a swampy environment with low oxygen for peat to form. Peatlands are able to withstand toxic, low-oxygen, high-water, and nutrient-poor conditions.
An area of land that is consistently damp or muddy is called a swampy environment. Even marshes frequently have water covering them. There are two types of swampy environment : freshwater swamps and saltwater swamps. In marshes, trees predominate.
Caddo Lake, the Great Dismal, and Reelfoot are three swamps that are centred on large lakes. swampy environment and bayous are frequently associated in the Southeast of the United States, especially in the Gulf Coast region. A type of marsh known as a baygall can be found in the woodlands of the states around the Gulf Coast.
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Gregor Mendel performed crosses using true-breeding pea plants and observed the traits exhibited by the offspring. He crossed a yellow-seed male plant with a green-seed female plant. He then allowed the offspring (F generation) to self-fertilize, producing offspring (F generation). Based on his results, Mendel concluded that traits can be masked. What evidence best supports Mendel's conclusion?
Answer:
D. the green color trait was missing from the F1 generation, but reappeared in the F2 generation supports Mendel's conclusion that traits can be masked. This observation demonstrated the principles of dominant and recessive traits, with the green trait being recessive and masked in the F1 generation by the dominant yellow trait. The reappearance of the green trait in the F2 generation showed that it was not lost but rather masked in the F1 generation.
The evidence that best supports Mendel's conclusion that traits can be masked is the observation of the F1 generation. When Mendel crossed a yellow-seed male plant with a green-seed female plant, all the offspring in the F1 generation had yellow seeds, indicating that the yellow trait was dominant over the green trait. However, when the F1 generation was allowed to self-fertilize, the F2 generation included some plants with green seeds, indicating that the green trait was still present, but had been masked in the F1 generation. This pattern of inheritance is consistent with the idea that there are dominant and recessive traits, and that dominant traits can mask the expression of recessive traits.
For science class need the best answer
Answer:
The prey will increase if the natural predators are removed from their natural habitat
QuestionThe best way to identify a cell as either prokaryotic or eukaryotic is to determine whetherAwhether the nucleus is true nucleus or not true nucleusBit has a nucleusCit has a plasma membraneDit has cytosolMedium
Prokaryotic cells lack membrane-bound organelles, whereas eukaryotic cells do (including the nucleus and mitochondria). DNA is found in eukaryotic cells' nuclei.
How can a scientist tell whether a cell is prokaryotic or eukaryotic?Based on the internal structure of the cell, a prokaryote and a eukaryote can easily be distinguished from one another. Prokaryotes lack a distinct nucleus, whereas eukaryotes have. Additionally, prokaryotes lack numerous specialised organelles such the endoplasmic reticulum, Golgi apparatus, and mitochondria.
What standards should be used to distinguish between prokaryotic and non-prokaryotic cells?Examining the cell structure under a microscope is the criterion for identifying whether cells are from prokaryotes, plants, or animals. Prokaryotes are organisms without a proper nucleus.
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Refer to this diagram.
Which structure acts as a clamp to hold the mRNA in place?
A. 1
B. 2
C. 3
D. 4
Structure 1 is a ribosome, that acts as a clamp to hold the mRNA in place. Therefore, option A is correct.
What is a ribosome?The biological machinery that produces proteins is known as a ribosome. Each cell contains several ribosomes, which are each composed of two subunits.
These two subunits form a tight seal around the messenger RNA molecule before moving down its length and reading each three-letter codon. They are formed inside the nucleolus in the nucleus.
Thus, structure 1 in the diagram is a ribosome, that acts as a clamp to hold the mRNA in place. Therefore, option A is correct.
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How do you label a person's digestive system?
Labelling a person's digestive system necessitates knowledge of its anatomy and physiology.
The digestive system is a complex network of organs and physical components that collaborate to process and absorb nutrients from meals. The mouth, oesophagus, stomach, small intestine, large intestine, rectum, and anus are all part of it. Each of these organs is in charge of breaking down food into smaller components that the body may use for energy and development.
Chewing and saliva combine to break down food into smaller particles in the mouth, which is the initial site of interaction with food. The oesophagus is a muscular tube that travels from the mouth to the stomach. The stomach is a muscular, sac-like organ where protein, fat, and carbohydrate digestion starts. The small intestine completes digestion and absorbs the majority of nutrients from meals. The large intestine is in charge of reabsorbing water and electrolytes from meals as well as forming excrement. The rectum and anus are responsible for storing and eliminating waste products from the digestive system.
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with regard to tonicity, two solutions that have the same concentrations of nondiffusible solutes and water are said to be
When two solutions have the same concentration of non-diffusible solutes (such as proteins or ions) and water, they are said to be isotonic with connection to tonicity.
What does tonicity mean?Tonicity refers to the effect of a solution on the shape and volume of a cell. When a cell is placed in a solution, water will move across the cell membrane to equalise the concentration of solutes on both sides of the membrane. The direction and amount of water movement will depend on the concentration of solutes in the solution relative to the concentration of solutes inside the cell.
If the concentration of solutes in the solution is lower than that inside the cell, water will move into the cell, causing it to swell and possibly burst. This type of solution is called hypotonic.
If the concentration of solutes in the solution is higher than that inside the cell, water will move out of the cell, causing it to shrink and shrivel. This type of solution is called hypertonic.
If the concentration of solutes in the solution is the same as that inside the cell, there will be no net movement of water across the membrane, and the cell will maintain its normal shape and volume. This type of solution is called isotonic.
For example, red blood cells must be maintained in an isotonic environment to function properly, and medical solutions such as intravenous fluids must be carefully chosen to avoid damaging cells by creating a hypertonic or hypotonic environment.
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It is permissible to enter an excavation to get a soil sample. True or False
Answer:
False
Explanation:
You have two black beetles: Eleodes carbonarius and Eleodes armata. What level of classification do they both belong? A. Genus B. Family C. Order D. All of the above
Answer:
Genus
Explanation:
They would both belong to the Genus "Eleodes"
Eleodes carbonarius and Eleodes armata are belongs to Genus level of classification do they both belong, hence option A is correct.
What is genus level of classification?In biological categorization, a genus is a taxonomic group that comes after family and before species. A genus consists of animals with related characteristics.
A collection of connected living objects (such as plants or animals) that, according to scientific classification, is made up of one or more species and is placed below the family.
The general concept behind a genus is that it represents species that are ancestrally related, are distinct from other genera, and do not include an excessive amount of species, even though classification schemes vary between scientists studying various organisms.
Therefore, option A is correct.
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What is responsible for gene expression in eukaryotes?
Numerous factors, including as gene loss, amplification, and rearrangement, affect how eukaryotes express their genes. Differentially transcribed genes have varied uses for their RNA transcripts. Multiple gene families control the frequency, variety, and timing of gene expression.
Gene expression is the process through which a gene's information is used to create a functioning gene product, allowing it to produce end products like proteins or non-coding RNA and eventually have an impact on phenotypes. However, in non-protein-coding genes like transfer RNA (tRNA) and small nuclear RNA (snRNA), the end result is a functional non-coding RNA instead of a protein.
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Increased sympathetic stimulation causes vasodilation, bringing elevated blood pressure back to normal. A) True B) False
Increased sympathetic stimulation causes vasodilation, bringing elevated blood pressure back to normal. The above statement is False.
In sympathetic stimulation, nervous system gets activated which increases heart's speed, which in result delivers more blood to the areas of the body that needs more oxygen and perform other responses to help the body come out of the danger which is performed by vasoconstriction.
Vasoconstriction plays role in stressful situations which increasing the blood pressure and speed of the heart.
In conclusion, sympathetic stimulation causes vasoconstriction.
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what is the meaning of cardinal movements labor
Cardinal movements of labor refer to the series of movements that a baby goes through during the process of childbirth.
These movements help the baby navigate through the birth canal and ultimately be delivered safely. There are seven cardinal movements of labor, which include engagement, descent, flexion, internal rotation, extension, external rotation, and expulsion.
Engagement occurs when the baby's head enters the mother's pelvis, while descent refers to the baby moving down through the birth canal. Flexion occurs when the baby tucks its chin to its chest, allowing its head to fit through the pelvis.
Internal rotation happens when the baby's head rotates to align with the mother's pelvis. Extension occurs when the baby's head passes through the vagina, followed by external rotation where the baby's head returns to its original position. Finally, expulsion happens when the baby is fully delivered.
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which force contributes to the stability of a dna double helix?A. hydrophobic interactions of bases in the same strand.
B. hydrogen bonding between bases in opposite strands.
C. hydrophobic interactions of bases in the same strand and hydrogen bonding between bases in opposite strands.
D. ionic interactions between the positively charged component of one base and the negatively charged component of the neighboring base.
E. hydrophobic interactions of bases in the same strand, hydrogen bonding between bases in opposite strands, and ionic interactions between the positively charged component of one base and the negatively charged component of the neighboring base.
Therefore, the correct answer is option B: hydrogen bonding between bases in opposite strands. Options A, C, D, and E do not accurately reflect the main force that contributes to the stability of a DNA double helix.
The force that contributes to the stability of a DNA double helix is hydrogen bonding between bases in opposite strands.
The nitrogenous bases (adenine, thymine, guanine, and cytosine) of the two complementary strands in DNA are held together by hydrogen bonds. Adenine forms two hydrogen bonds with thymine, while guanine forms three hydrogen bonds with cytosine.
These hydrogen bonds provide the stability required to hold the two strands together in a double helix structure.
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Gregor Mendel conducted several investigations using pea plants. He developed the Law of Independent Assortment based on the evidence produced from his experiments. Which of the following is contributed to this law?
A. greater strength of dominant alleles
B. final stages of gametogenesis
C. random fertilization of gametes
D. genetic variation withing species
Gregor Mendel developed the Law of Independent Assortment based on the evidence produced from his experiments because D. genetic variation within species contributed to this law.
What is the Law of Independent Assortment developed by Mendel?The Law of Independent Assortment developed by Mendel indicates that the alleles of a gene are inherited independently from other alleles on another gene.
Therefore, with this data, we can see that the Law of Independent Assortment developed by Mendel indicates the independence in the transmission of inherited characters or genes during fecundation.
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Suppose you're analyzing a newly discovered unicellular organism to determine whether it should be classified as a prokaryote or eukaryote. How should you approach it?
In the nucleus of eukaryotes, genetic material is stored. Unlike eukaryotic cells, prokaryotic cells lack membrane-bound organelles (including the nucleus and mitochondria).
How can you tell whether a single cell is prokaryotic or eukaryotic?Prokaryotic and eukaryotic comparison-
Eukaryotic cells contain a membrane-bound nucleus, whereas prokaryotic cells do not, and this is the main difference between these two types of organisms. Eukaryotes keep their genetic information in the nucleus.
How does one define a eukaryotic cell in a unicellular organism?Single-celled or multicellular eukaryotes are both possible. By having internal membranes that divide certain eukaryotic cell components from the remainder of the cytoplasm, eukaryotes are distinguished from the prokaryotes, another group of creatures. Organelles are the name for these membrane-bound objects.
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