In this question, the answer to the question is: Box D corresponds to plants with a heterozygous genotype. we are given four boxes with different letters and numbers representing the genotypes of plants.
To determine which boxes correspond to plants with a heterozygous genotype.
We need to understand the concept of heterozygosity and the notation used to represent genotypes.
Heterozygosity refers to the presence of two different alleles at a given gene locus in an organism's genome. In genetic notation, the two alleles are represented by letters, with the dominant allele typically represented by a capital letter and the recessive allele by a lowercase letter.
For example, if the gene for flower color in a plant has two alleles, one for purple flowers (dominant) and one for white flowers (recessive), then a plant with a heterozygous genotype for this gene would have one allele for purple flowers (represented by the letter P) and one allele for white flowers (represented by the letter p).
Now, looking at the six boxes given in the question, we can see that only box D represents a heterozygous genotype. Box D has the letters D and d, which indicates that this plant has one allele for the dominant trait (represented by the capital D) and one allele for the recessive trait (represented by the lowercase d).
Therefore, the answer to the question is: Box D corresponds to plants with a heterozygous genotype.
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(T/F) meiosis halves the chromosome number, whereas mitosis maintains the same chromosome number.
Meiosis halves the chromosome number, whereas mitosis maintains the same chromosome number- True.
Meiosis is a kind of cell division that generates daughter cells, each of which has half as many chromosomes as the parent cell. Reproductive cells divide through a process called meiosis to create gametes and sex cells.
Meiosis is divided into two phases, I and II. In order to guarantee that the creature produced following fertilisation of both male and female gametes has the proper set of chromosomes, the number of chromosomes in gametes is reduced by half. For instance, a diploid creature creates haploid gametes, which when they combine, create another diploid organism.
Another cell division process that yields identical daughter cells is mitosis. Insofar as they have the same number of chromosomes as the parent cell that underwent cell division, they are identical. For instance, a diploid cell goes through mitosis to create two daughter cells that are diploid.
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the basic units of structure and function for both plants and animals are
Answer: Cell theory
Explanation: Cells are the fundamental unit of structure and function in all living organisms
what type of compensation is characterized by the detection of hypotension by baroreceptors in the carotid sinus and aortic arch?
The type of compensation that is characterized by the detection of hypotension by baroreceptors in the carotid sinus and aortic arch is the Baroreceptor Reflex.
What are Baroreceptors?
Baroreceptors are specialized nerve cells that identify changes in blood pressure and send signals to the brain, which results in alterations in autonomic function that help to keep blood pressure in a healthy range.
Baroreceptor reflex is a physiological mechanism that maintains arterial blood pressure near normal levels by detecting changes in blood pressure and adjusting heart rate, blood vessel diameter, and blood volume consequently to keep blood pressure constant.
What is Hypotension?
Hypotension, also known as low blood pressure, is a condition in which blood pressure is too low, generally defined as blood pressure below 90/60 mm Hg. This condition may lead to poor circulation and, in severe cases, hypotensive shock, which can be life-threatening.
What is a Carotid Sinus?
The carotid sinus is widening at the bifurcation of the common carotid artery. It is found just above the thyroid cartilage and below the hyoid bone in the neck. Baroreceptors are found in the carotid sinus and monitor blood pressure changes.
What is the Aortic Arch?
The aortic arch is a part of the aorta that arches and curves downward like a horseshoe, which occurs after the ascending aorta and before the descending aorta. Baroreceptors are also found in the aortic arch and monitor blood pressure changes.
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where is the majority of protein digestion and absorption taking place?
Answer:
Explanation:
the small interstine
how is natural selection related to sexual reproduction as opposed to asexual reproduction? group of answer choices sexual reproduction allows the greatest number of offspring to be produced. sexual reproduction results in the most appropriate and healthiest balance of two sexes in the population. sexual reproduction results in the greatest number of new mutations. sexual reproduction results in many new gene combinations, some of which will lead to differential reproduction.
Natural selection is related to sexual reproduction as opposed to asexual reproduction because sexual reproduction results in many new gene combinations, some of which will lead to differential reproduction.
This enables the offspring to have genetic diversity, which is necessary for natural selection. This process creates genetic diversity among organisms, allowing for the selection of the best-suited organisms to survive in a particular environment. In contrast, asexual reproduction does not have the genetic diversity necessary for natural selection. The significance of sexual reproduction is that it results in many new gene combinations, some of which are advantageous and enable the offspring to survive and reproduce better in a given environment. These new combinations also help in providing resistance to diseases and pests, which helps the organisms to survive better. Thus, sexual reproduction has a distinct advantage over asexual reproduction, which is why natural selection is related to sexual reproduction rather than asexual reproduction. Sexual reproduction enables the production of new genetic combinations that make the offspring well-suited to their environment.To learn more about Reproduction Please visit:
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Why is the mitochondria the most important organelle
The mitochondria is often considered the most important organelle in eukaryotic cells due to its crucial role in energy production.
Mitochondria are responsible for generating ATP, the primary source of energy for the cell, through a process called cellular respiration. This process involves the breakdown of glucose and other molecules to produce ATP, which is used to power cellular processes such as muscle contraction, cell division, and the synthesis of proteins and other important molecules. Additionally, mitochondria play a role in calcium signaling and regulation of apoptosis, or programmed cell death. Without functional mitochondria, cells cannot produce sufficient energy to carry out their functions and can eventually die. Therefore, the mitochondria is considered the most important organelle because it is essential for the survival and function of eukaryotic cells.
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which human activity is likely to cause damage to an environment?
Answer:
D. Clear-cutting a forest for development
Explanation:
Cutting down the forest causes damage to the environment because the trees which are part of the environment are destroyed during the clear-cutting of the forest
if bacterial cells have acquired the ability to live in the presence of the antibiotic ampicillin, then what can be inferred about any other genes contained on the recombinant plasmid?
It can be assumed that the recombinant plasmid has at least one gene that confers resistance to ampicillin if bacterial cells have learned to survive in the presence of the antibiotic.
Without additional testing or analysis, it cannot be determined whether the recombinant plasmid contains any additional genes.
AntibioticsIt is assumed that the recombinant plasmid has the gene for ampicillin resistance if bacterial cells have developed the ability to survive in the presence of the antibiotic ampicillin.
A desired gene and a selectable marker gene, such as the gene for ampicillin resistance, are often incorporated into a plasmid during the process of making recombinant plasmids.
Due to their ability to proliferate in the presence of the antibiotic, this enables the selective isolation of only the bacteria that have been effective in utilizing the recombinant plasmid.
In light of this, the fact that bacteria can survive in the presence of the antibiotic ampicillin proves that the recombinant plasmid was successfully incorporated into the bacterium and that the ampicillin resistance gene is present in the bacteria.
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The heterotrophic, eukaryotic, multicellular organism without cell wall is included in the kingdom____AProtistaBFungiCPlantaeDAnimalia
The heterotrophic, eukaryotic, multicellular organism without cell wall is included in the kingdom D. Animalia.
The term "heterotrophic" refers to an organism that gets its energy from consuming other organisms. Eukaryotic organisms are those that have a nucleus enclosed within a membrane, while multicellular organisms have more than one cell. Cell walls are present in all kingdoms except the kingdom Animalia. Animals have a unique structural and physiological system that allows them to move from one place to another in search of food, water, and other essential requirements.
Because of their heterotrophic mode of nutrition and lack of cell walls, they are classified as members of the Animalia kingdom. Protista, Fungi, and Plantae are the other three kingdoms that exist. Members of the kingdom Protista are unicellular or multicellular eukaryotic organisms that do not fit into any other kingdom. Members of the kingdom Fungi are eukaryotic, mostly multicellular organisms that absorb nutrients from organic materials in their surroundings. Members of the kingdom Plantae are multicellular eukaryotic organisms that are photosynthetic and have cell walls made of cellulose.
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On a rock in coastal Maine, the fungus, the algae, and the bacteria make up which of the following? Select all that apply.
On a rock in coastal Maine, the fungus, algae, and bacteria make up what is known as a lichen. Lichens are symbiotic organisms composed of two or three different types of microorganisms living together in a mutually beneficial relationship.
In the case of coastal Maine, the fungus provides the structural support and protection for the other organisms, while the algae and bacteria provide food through photosynthesis and nitrogen fixation, respectively.Lichens are unique in that they can survive in extreme environments such as deserts, tundras, and rocky coastlines, where other plants cannot. They also play important roles in the ecosystem by contributing to soil formation and nutrient cycling, providing habitat and food for animals, and serving as indicators of air pollution.
In addition to their ecological importance, lichens have been used by humans for medicinal, dyeing, and food purposes for centuries. Some species of lichens contain compounds with antibiotic properties, while others can be used as natural dyes. Some indigenous cultures also use lichens as a food source, although caution must be taken as some species can be toxic.
In summary, the fungus, algae, and bacteria on a rock in coastal Maine make up a lichen, which is a symbiotic organism with ecological, medicinal, and cultural significance.
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After an egg is released, the empty follicle in the ovary secretes __________, which inhibits both FSH and LH. What word completes the sentence?
After an egg is released, the empty follicle in the ovary secretes "progesterone", which inhibits both FSH and LH.
A follicle is a small, fluid-filled sac in the ovary that contains an immature egg, or oocyte. During each menstrual cycle, several follicles begin to develop in the ovary under the influence of follicle-stimulating hormone (FSH) produced by the pituitary gland. Eventually, one of these follicles becomes dominant and continues to develop, while the others degenerate.
After ovulation, the remaining follicle in the ovary (called the corpus luteum) produces progesterone, which helps prepare the uterine lining for possible implantation of a fertilized egg. Progesterone also inhibits the secretion of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) by the pituitary gland, which helps prevent the development of additional follicles in the ovary and the release of additional eggs during the menstrual cycle.
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Part B Despite the fact that the partial pressure difference is so much smaller for CO2, why is there as much CO2 exchanged between the alveoli and blood as there is O2?CO2 is much more soluble in blood than O2.CO2 is a smaller molecule and diffuses faster than O2.The capillary walls are more permeable to CO2 than O2.
This is because CO2 is much more soluble in blood than O2.
Throughout the body, petrol exchange takes place at two different locations: the tissues, where oxygen is produced and carbon dioxide is picked up, and the lungs, where oxygen is taken in and released at the respiratory membrane. The exchange of gases with the environment outside takes place in the lungs' alveoli and is known as external respiration. Internal respiration, which takes place in the tissues, is the exchange of gases with the internal environment.
Simple diffusion is what causes the actual exchange of gases. Carbon dioxide and oxygen can pass through membranes without the use of energy. As opposed to that, these gases adhere to pressure gradients, which allows them to disperse. Maximum gas diffusion is achieved by the lung's anatomy: In addition to having a relatively thin blood capillary membrane and a highly permeable respiratory membrane, the lungs have a huge surface area.
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a positive tuberculin skin test is an example of . group of answer choices psoriasis innate immunity autoimmunity acute contact dermatitis delayed cell-mediated immunity
A positive tuberculin skin test is an example of delayed cell-mediated immunity.
The tuberculin skin test (TST) is a screening test that aids in the diagnosis of latent tuberculosis (TB) infection. The test is also known as the Mantoux test. The test includes injecting a little quantity of a substance called tuberculin into the skin of the forearm.
Tuberculosis is transmitted through the air and affects the lungs in most instances. The bacteria may cause a latent tuberculosis infection, in which the immune system is capable of halting its development. This means that the bacteria are alive but not active in the body, and a person with latent tuberculosis infection does not have TB disease symptoms.
Delayed cell-mediated immunity, which is a specific immune reaction, is responsible for keeping the bacteria under control. This immunity is indicated by a positive tuberculin skin test. A reaction occurs at the site of the injection after 48-72 hours if a person has this immunity.
A medical professional reads the test reaction, and the results determine the degree of immunity.
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Carbonic acid forms when carbon dioxide dissolves in water. Carbonic acid
can break down limestone in a process called carbonation. What kind of
erosion would carry the rock particles away?
A. Glacial uplift?
B. Mass movement?
C. Wind erosion?
D. Chemical erosion?
Chemical erosion would carry the rock particles away.
DefintionBy way of a mechanical process, water, gases, and other organisms break down soils, rocks, and minerals as they are weathering. Chemical weathering, on the other hand, is a process that uses chemical processes to erode or disintegrate these particles. The chemical makeup of the minerals that make up it is changed by a variety of chemical processes, such as carbonation, hydrolysis, acidification, oxidation, and lichens. The parent material from which soil is formed is created by a long-term process that produces secondary or new minerals.Calcium and phosphorus are two examples of the minerals that are extracted from rocks and employed in numerous commonplace processes, such as farming.For more information on erosion kindly visit to
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why are fossil fuels used as a primary source of energy?
A. they provide clean energy and are helpful to the environment
B. we will never run out of them on earth
C. they are abundant and inexpensive
D. all of the above
Answer:
C. They are abundant and inexpensive
Explanation:
When burned to produce energy fossil fuels cause harmful greenhouse gas emissions such as carbon dioxides.
We will eventually run out of fossil fuels because they are non-renewable
What trophic level do orcas belong in, supporting Paine’s theory?
Answer:
quaternary consumers.
Explanation:
In the example above, phytoplankton are the primary producers, zooplankton are primary consumers, small fish are secondary consumers, porpoises are tertiary consumers and orca whales are quaternary consumers.
the adrenal medulla is important to the sympathetic branch of the autonomic nervous system because it the adrenal medulla is important to the sympathetic branch of the autonomic nervous system because it releases epinephrine and norepinephrine directly into the blood. is considered a modified sympathetic ganglion. is a source of catecholamines. is a source of catecholamines, is considered a modified sympathetic ganglion, and releases epinephrine and norepinephrine directly into the blood. is a source of catecholamines and is considered a modified sympathetic ganglion.
The adrenal medulla is important to the sympathetic branch of the autonomic nervous system because it is a source of catecholamines, is considered a modified sympathetic ganglion, and releases epinephrine and norepinephrine directly into the blood.
The adrenal medulla is a part of the adrenal gland that produces and secretes hormones that respond to stress. The medulla produces and releases catecholamines into the bloodstream. The catecholamines epinephrine and norepinephrine are examples of these hormones. The adrenal gland, like the hypothalamus and pituitary gland, is a part of the endocrine system.
The adrenal medulla's primary function is to produce and secrete catecholamines in response to stress. It is a portion of the adrenal gland that is linked to the sympathetic nervous system. The adrenal medulla is responsible for the production of 80% epinephrine and 20% norepinephrine.
Catecholamines are produced when the medulla is stimulated by the sympathetic preganglionic neurons. is considered a modified sympathetic ganglion, and releases epinephrine and norepinephrine directly into the blood. is a source of catecholamines and is considered a modified sympathetic ganglion. This statement is correct .
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The city planners identify that there will be a trade-off: not all
criteria can be met. The planners prioritize the importance of
low operating costs and a small carbon footprint.
Which energy source is the city most likely to choose? Provide
relevant evidence from the graphs to support this choice.
Enter your answer in the box provided.
Renewable energy sources such as solar or wind power are the most probable option for the city planners based on the given information.
What is an Energy Source?An energy source is a substance or phenomenon that can be used to generate energy in various forms such as heat, electricity, or mechanical work.
Based on the provided information, the city planners are most likely to choose renewable energy sources, such as solar or wind power, which have relatively low operating costs and a small carbon footprint compared to non-renewable energy sources like coal, oil, and natural gas.
The evidence from the graphs shows that renewable energy sources have the lowest operating costs and produce the least amount of carbon dioxide emissions compared to other energy sources.
Therefore, choosing renewable energy sources aligns with the priorities of the city planners and would be the most appropriate choice to meet their criteria.
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why is fermentation a required pathway for providing cellular energy when oxygen is unavailable or in insufficient supply?
NAD+ is not regenerated by the electron transport chain. ATP production requires oxygen. NADH cannot be reduced to NAD Cells need either lactic acid or ethanol when oxygen is low, Lactic acid or ethanol can be used to generate oxygen.
Fermentation is a required pathway for providing cellular energy when oxygen is unavailable or in insufficient supply because a. NAD+ is not regenerated by the electron transport chain.
The electrons carried by NADH must be transferred to an electron acceptor in order to keep the electron transport chain running, and this requires NAD+ to be available. When oxygen is present, NAD+ can be regenerated by accepting electrons from the electron transport chain, but when oxygen is not available or in insufficient supply, NAD+ cannot be regenerated in this way, this means that the electron transport chain stops running, which means that ATP production also stops.
Cells need ATP to function, so they must find another way to generate it. Lactic acid fermentation and ethanol fermentation are two processes that can generate ATP without the need for oxygen. In these processes, NADH is oxidized to NAD+ by accepting electrons from pyruvate or acetaldehyde, respectively, which allows glycolysis to continue and generate ATP. Therefore, fermentation is a crucial pathway for providing cellular energy when oxygen is unavailable or in insufficient supply.
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when voltage-gated sodium channels open in a neuron, what happens to the membrane potential as a result?
When voltage-gated sodium channels open in a neuron, depolarization of the membrane potential occurs as a result.
What is a Voltage-gated sodium channel?The protein channels that enable the sodium ions (Na+) to diffuse through the cell membranes, responsible for initiating the action potential in neurons and muscle cells, are known as voltage-gated sodium channels. The channels are triggered by changes in the electrical potential difference across the membrane, or voltage, hence the term "voltage-gated."
Depolarization occurs as a result of the opening of the sodium ion channels in the neuron's membrane. When a neuron is stimulated, these channels open and sodium ions enter the neuron, reversing the electrical potential of the membrane from negative to positive.
In conclusion, when voltage-gated sodium channels open in a neuron, depolarization of the membrane potential occurs as a result.
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Briefly compare and contrast the differences and similarities of chondrocyte cells to a genelized plant cell.
Chondrocyte cells and generalized plant cells are both eukaryotic cells with a nucleus and other membrane-bound organelles, but there are several differences between them:
Structure: Chondrocyte cells are animal cells that are typically round or oval in shape and contain a dense matrix of collagen fibers, proteoglycans, and other extracellular matrix components. Plant cells, on the other hand, are generally rectangular in shape and have a rigid cell wall made of cellulose.
Function: Chondrocyte cells are responsible for producing and maintaining cartilage in the body. Plant cells, meanwhile, perform a variety of functions related to photosynthesis, storage, and support.
Organelles: Both chondrocyte cells and plant cells have many of the same organelles, such as mitochondria, ribosomes, and Golgi apparatus. However, plant cells also have unique organelles such as chloroplasts for photosynthesis, and large central vacuoles for storage.
Reproduction: Chondrocyte cells do not typically divide once they have matured. Plant cells, however, can divide through mitosis and also have the ability to differentiate into different types of cells.
Overall, while there are some similarities between chondrocyte cells and plant cells, the structural and functional differences between the two make them distinct cell types with unique roles in their respective organisms.
which structure in the plant produces pollen for plant reproduction?
species which share similar dna and similar anatomical structers may have evolved from a common ancestor
Answer: True
Explanation:
ecologists use similarities between ecosystems to classify them into broad categories called
Ecologists use similarities between ecosystems to classify them into broad categories called biomes.
Biomes are defined as large, distinct regions of the world that are characterized by similar climate, vegetation, and animal life. There are several different types of biomes, including tropical rainforest, desert, temperate grassland, taiga, tundra, and more. Each biome has unique characteristics that distinguish it from other biomes, such as temperature range, precipitation patterns, soil type, and dominant vegetation. By classifying ecosystems into biomes, ecologists are able to compare and contrast different regions of the world, and understand how changes in climate, land use, and other factors impact ecosystems in different parts of the world. Biome classification also helps with conservation efforts, as it provides a framework for identifying and protecting areas with high biodiversity and unique ecological features.
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in a population with 7 different alleles for the melanin gene, how many variants of the melanin gene are there?
a. 7
b. 21
c. 14
d. 28
e. 3.5
When considering the melanin gene in a population with 7 different alleles, there are 7 variants of the melanin gene. The correct option is (a) 7.
What is a gene?A gene is a segment of DNA (deoxyribonucleic acid) that acts as a unit of heredity. It controls the production of specific proteins that are important for the function of the cell and the organism as a whole.
What is melanin?Melanin is a pigment that is present in the skin, hair, and eyes of many organisms. It protects the skin from the damaging effects of ultraviolet (UV) radiation, which can cause skin cancer and other health issues.
There are seven different alleles for the melanin gene in a population, indicating that there are seven variants of the melanin gene in this population. As a result, option (a) is the correct answer.
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During which stage of bacterial transcription is the σ sub-unit of the RNA polymerase involved?
a. Initiation
b. Elongation
c. Termination
d. Splicing
The σ sub-unit of the RNA polymerase is involved in the initiation stage of bacterial transcription.
During this stage, the RNA polymerase binds to the DNA promoter region with the help of the σ sub-unit, which recognizes specific sequences in the promoter region and guides the RNA polymerase to the transcription start site. Once the RNA polymerase is properly positioned, the σ sub-unit dissociates and the elongation stage of transcription begins, during which the RNA polymerase synthesizes a complementary RNA molecule using the DNA template strand.
The termination stage of transcription occurs when the RNA polymerase reaches a termination signal and releases the newly synthesized RNA molecule. Splicing is not a part of bacterial transcription.
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thomas frequently suffers from heartburn and has discovered he has gastroesophageal reflux disease (gerd). which sphincter closes to prevent gastric juices from entering the esophagus? which layer of the esophagus is damaged by the acid in gastric juices?
Food that has been swallowed is prevented from ascending by a ring of muscle fibres in the lower oesophagus. The lower esophageal sphincter is the term for these muscle fibres (LES).
The esophageal sphincter, upper or lower, is affected by GERD?The lower esophageal sphincter, which acts as a valve between the oesophagus and the stomach, frequently relaxes or weakens, allowing stomach contents to back up into the oesophagus.
The lower esophageal sphincter is what organ?A group of muscles called the lower esophageal sphincter (LES) is located where the oesophagus enters the stomach at the lower end. Acid and stomach contents cannot pass backward from the stomach when the LES is closed.
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which activities predominantly use slow-twitch muscle fibers?
Activities that predominantly use slow-twitch muscle fibers include long-distance running, cycling, swimming, and other endurance activities. Slow-twitch muscle fibers, also known as type I muscle fibers or slow oxidative fibers, are responsible for endurance activities.
These muscle fibers have a high capacity for aerobic respiration and generate energy through oxidative phosphorylation. Slow-twitch muscle fibers contract more slowly but can sustain muscle contraction for longer periods of time compared to fast-twitch muscle fibers.
They contain high levels of myoglobin, a protein that stores oxygen and enhances the efficiency of oxygen delivery to the muscles. Slow-twitch fibers are also rich in mitochondria, which produce ATP, the energy source required for muscle contraction. Some additional activities that predominantly use slow-twitch muscle fibers are: Cross-country, skiing Walking, Hiking Rowing, and Paddle-boarding.
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looking at the table of the genetic code in the video, which of the three bases in each codon is the 'least significant.' in other words, which one could change and have the least likelihood of changing the resulting amino acid? or is there no difference among the three bases?
Answer:
UAG,UGA,UAA. are the stop codons which terminate any process of translation resulting in the non formation of amino acids . These are the termination codons
6. Describe the relationship between air rising and sinking and rainforests. What is the
relationship between rising and sinking air and deserts?
Answer:
so that is how it goes hope this helps
Explanation: