DNA molecule has an antiparralel structure in which both strands are orientated opposite to each other. The statement is TRUE. Doubled-stranded dna consists of two antiparallel strands, meaning that one strand is oriented in the 5' to 3' direction, while the other is oriented in the 3' to 5' direction.
What is DNA molecule?
DNA is a nucleic acid molecule known as deoxyribonucleic acid. It is composed of paired nitrogenated bases that correspond to purines and pyrimidines and are arranged in two antiparallel strands.
These strands have different poles,
One of the extremes has a phosphate group, which is named 5'. The other extreme has a hydroxyl OH named 3'.
Both strands are readen in the 5' to 3' direction, but their orientation is opposite to each other, meaning they run in opposite directions.
The statement is TRUE. The doubled-stranded dna consists of two antiparallel strands, meaning that one strand is oriented in the 5' to 3' direction, while the other is oriented in the 3' to 5' direction.
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True. A double-stranded DNA consists of two antiparallel strands, meaning that one strand is oriented in the 5' to 3' direction, while the other is oriented in the 3' to 5' direction.
Structure of DNADNA is a double-stranded molecule in which the two strands are twisted around each other to form a double-helix structure.
The two strands in a DNA double-helix are antiparallel to each other with one strand, usually called the leading strand, oriented in the 5' to 3' direction while the other strand, otherwise known as the lagging strand, oriented in the 3' to 5' direction.
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what internal structure allows the plants to absorb food coloring into the carnation petals?
a. cell wall
b. mitochondrion
c. phloem
d. xylem
According to the research, the correct answer is Option D. The xylem allows the plants to absorb food coloring into the carnation petals.
What is the xylem?It is the tissue present in some plants that has the function of transferring minerals and water to different sectors of the organism.
In this sense, the colored water moves up the plant and changes the color of the leaves thanks to capillarity, the different forces of cohesion and the xylems, which help them transport water and minerals.
Therefore, we can conclude that according to the research, the function of the xylem is conduction, enabling the transfer of substances from the root to the rest of the plant.
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In the protein synthesis STEM case study, your patient Lucy was suffering from an immunodeficiency syndrome. What was the cause of her illness?
In the protein synthesis STEM case study, the patient Lucy was suffering from an immunodeficiency syndrome. The cause of her illness was that she didn't have enough white blood cells for her immune system to fight infections.
Lucy is a baby girl who comes with ear and skin infections. This shows that she has a deficiency of WBCs in her blood. The conditions are seen due to HIV or ADA-SCID. With her situation, ADA has an active site for the toxin, deoxyadenosine, to be broken down. However, an active site for mutations is caused by a change in an amino acid in that ADA's active site due to mutation in the DNA. This would cause a conformational change in the shape of the active site and thus the breakdown of protein is not possible. A mutated sequence with a stop codon will cause the termination of the amino acid chain too early. This termination will cause a protein sequence of much shorter length.
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darwin observed the finches on the galapagos island were similar in form except for variations of their beaks. he deduced that these variations were useful for?
Darwin deduced that these variations were useful for gathering food.
Darwin was able to come to the conclusion that the finches and other birds have adapted to the islands and specific ecosystems where they reside as a result of this variation, which led to the thesis that species are not permanent and unchanging but rather change over time from common ancestors.
Darwinism is a theory of biological evolution that was developed by the English naturalist Charles Darwin and others. This theory states that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce. Other proponents of Darwinism include Alfred Russel Wallace and Richard Dawkins.
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All protists are _____
a. lack mitochondria
b. are aquatic
c. live as single cells
d. have a nucleus
All protists have a nucleus and is therefore denoted as option D.
All protists are _ have a nucleus____ The correct option is D
What is Protists?
Protists are a diverse group of single celled organisms that belong to the kingdom Protista. They are eukaryotic meaning they have a defined nucleus and other complex cell structures and they can be found in a variety of environments, including freshwater, marine, and soil.
Some common examples of protists include:
Algae AmoebasParameciaSlime molds.Therefore, Protists play important roles in the ecosystem as primary producers and as part of the food chain.
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Use the same article to answer the following question. Lung transplants why are people on the donor list given a lung allocation score and which factor has been eliminated as a reason for a transplant?.
People are on the donor list given a lung allocation score because it determines priority for receiving а lung trаnsplаnt when а donor's lung becomes аvаilаble. The factor that has been eliminated as a reason for a transplant is lung candidates under the age of 12.
The lung аllocаtion score (LАS) is used to prioritize wаiting list cаndidаtes 12 yeаrs аnd older bаsed on а combinаtion of wаitlist urgency аnd post-trаnsplаnt survivаl. The lung аllocаtion system determines the order of everyone аwаiting а lung trаnsplаnt by their lung аllocаtion score, blood type, аnd the distаnce between the cаndidаtes аnd the hospitаl where the lung donor is locаted. Аge аlso plаys а role becаuse lungs from pediаtric (аges 0-11) аnd аdolescent (аges 12-17) donors аre offered first to pediаtric аnd аdolescent trаnsplаnt cаndidаtes before they аre offered to аdults.
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cytoskeletal structures that are not found in all cell types are group of answer choices microtubules. intermediate filaments. microfilaments. intermediate tubules. fibrous filaments
The cytoskeletal structures that are not found in all cell types are intermediate filaments.
Eukaryotic cells have a cytoskeleton consisting of filamentous proteins that supports the cell and its cytoplasmic components mechanically. Three main kinds of components, which vary in size and protein content, make up the cytoskeleton in all cells. With a diameter of roughly 25 nanometers (nm), microtubules are the biggest form of filament and are made of the protein tubulin. The smallest kind, actin filaments, are formed of the actin protein and have a diameter of just around 6 nm. As the name implies, intermediate filaments have a diameter of around 10 nm. In contrast to microtubules and actin filaments, intermediate filaments are made up of several distinct subunit proteins.
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Associate the following statements with the appropriate group of primates: Strepsirrhini, hominoidea, hominidae
Strepsirrhini, Hominoidea, and Hominidae are all groups of primates. Strepsirrhini includes primates such as lemurs and bush babies, and they are characterized by having moist noses, lack prehensile tails, and have mobile shoulder joints.
Hominoidea includes apes, and Hominidae includes humans, and some other species. These primates are characterized by having large brains and being able to use tools. They are also capable of vocalizing and can communicate with each other through sounds and gestures.
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Identify a true statement about the cerebral hemispheres of the brain.
Multiple Choice
- They are of the same shape and size and perform the same functions. - The corpus callosum connects the two hemispheres of the brain. - The right hemisphere processes information in a more analytic manner than the left hemisphere. - They operate independently.
It is correct to state about the cerebral hemispheres of the brain that the right hemisphere of the brain brain processes more analytically than the left hemisphere.
What is the right cerebellar hemisphere of the brain?Language-related activities are connected to the right cerebellar hemisphere, while visuospatial activities are connected to the left cerebellar hemisphere. Working memory for words is one of the executive processes that is connected to both hemispheres. Another neocerebellar function is attention.
What parts of the brain's hemispheres include structures?Through the lateral fissure, parieto-occipital sulcus, and central sulcus, each cerebral hemisphere is divided into four distinct lobes. The frontal lobe and parietal lobe are divided by the central sulcus, which runs from posterior-medial to anterior-lateral. Speech, thought, emotions, and reading are all controlled by the cerebrum, which is one-half of the brain.
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a. Why does the east coast of the United States have more latent heat flux in July than January?b. Why does the east coast of the United States have more latent heat flux than the southwest in July?c. Why do the oceans generally have more latent heat flux than land surfaces?d. Why does the band of high latent heat flux in Africa move south to north and back again as you go from January to July and back to January?
Latent heat is a type of energy that is stored in a substance when it changes from one state to another, such as from liquid to gas or from solid to liquid. It is a significant factor in understanding the Earth's climate patterns.
The following are detailed explanations of the questions regarding latent heat flux in different regions of the world.a. The east coast of the United States has more latent heat flux in July than in January because of the differences in temperature and humidity between these two months. In July, the air is warmer and more humid, leading to increased evaporation of water and more latent heat being released into the atmosphere.
b. The east coast of the United States has more latent heat flux than the southwest in July because of differences in the water sources available for evaporation. The east coast is surrounded by the Atlantic Ocean, which provides a large source of water for evaporation, while the southwest region is drier and has less water available.
c. Oceans generally have more latent heat flux than land surfaces because water has a higher heat capacity than land. This means that it takes more energy to heat water than land, and as a result, more latent heat is released into the atmosphere when water evaporates.
d. The band of high latent heat flux in Africa moves south to north and back again as you go from January to July and back to January due to the changing patterns of wind and precipitation in the region. In July, the winds shift to the northwest, bringing dry air and leading to less latent heat being released in the southern region.
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the envelope of a mumps virus is called
The mumps virus, causes the sickness that can be prevented by vaccination, is a negative-sense, single-stranded RNA virus made up of a ribonucleocapsid core encased by a lipid membrane from the host cell.
A paramyxovirus, which belongs to the Rubulavirus family, is the virus that causes the mumps. The mumps virus (MuV), a non-segmented, enveloped member of the Paramyxoviridae family of RNA viruses, is what causes mumps. The paramyxovirus that causes the mumps is in the same family as the viruses that cause parainfluenza and Newcastle disease, which cause antibodies to cross-react with the mumps virus. A single-stranded RNA genome makes up the virus. The virus can be isolated or grown in cultures of different human and primate tissues as well as in fertilised eggs.
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hat is the difference between first order heterotroph and a third-order heterotroph?
The difference between first order heterotrophs (e.g. herbivores) and third-order heterotrophs is based on the fact that first-order heterotrophs eat producer organisms while third order heterotrophs (carnivores) eat second order heterotrophs.
What are first order heterotrophs?The expression first order heterotrophs is used to denote organisms that eat producers such as for example herivores that eat plats to survive, while third-order heterotrophs are carnivores.
Therefore, with this data, we can see that first order heterotrophs are animals that eat producers such as for example plants and or algae and third order heterotrophs are carnivores.
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what behavior do these monkeys perform to access the clam meat?
Monkeys use a tool to crack open clams to access the meat.
Many species of monkeys are known to use tools to access food. One example of this behavior is the use of sticks or rocks to crack open clams to access the meat inside. This type of tool use is considered a form of problem-solving, as the monkeys must figure out how to use the tool effectively in order to obtain the food.
This behavior is considered a form of advanced cognition and is seen as a way for the monkeys to adapt to their environment and find food resources.
Additionally, the use of tools by monkeys is an important aspect of their social behavior, as they often share tools and teach each other how to use them. This type of tool use and problem-solving is an important aspect of primate behavior and has been studied extensively by researchers to better understand the evolution of intelligence in primates.
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when a scientist uses many specific observations to construct a general scientific principle, the scientist is using reasoning?
Answer: inductive
Explanation:
A group of scientists were studying the growth of bacteria. It is their hope that they will be able to induce the bacteria to grow and metabolize oil as a food source. They have taken three samples of Escherichia coli and are growing them on nutrient agar plates. The scientists used three conditions to test the E. coli bacteria. The first group was grown at 37°C on plain nutrient agar plates. The second group was grown at 37°C on plain nutrient agar plates with a 5% oll solution. The third group was grown at 37°C on plain nutrient agar plates with a 20% oil solution. The results of the experiment are listed in the graph below. What is the independent variable?
A.
The type of bacteria used.
B.
The nutrient agar.
C.
The nutrient agar with oil
D.
The number of days the bacteria grew.
Answer:
the type of bacteria used
Explanation:
Marine Science
1. What methods were used to minimize the damage from the oil after the
Deepwater Horizon incident?
2. How does diffusion impact the toxicity of an environment?
3. Explain how pollutants in marine environments impact human health.
4. How do red tides impact the environment?
5. How does garbage in the ocean harm sea creatures?
After the Deepwater Horizon incident, several methods were used to minimize the damage from the oil, including:
Containment and cleanupNatural degradationCollection and removal of oiled debris from shorelines and wildlife habitats.What are the effects of diffusion?Diffusion impacts the toxicity of an environment by spreading pollutants over a larger area. The dilution of pollutants through diffusion can decrease the concentration and therefore the toxicity of the environment. However, this process depends on the flow of water and the ability of the pollutants to diffuse, so it may not always be effective in reducing toxicity.
Pollutants in marine environments can impact human health through the food chain. Contaminants from pollutants, such as heavy metals and toxic chemicals, can accumulate in the tissues of fish and shellfish, which are then consumed by humans.
Red tides are caused by blooms of toxic algae that can have a severe impact on the environment. The toxins produced by these algae can kill fish, seabirds, and marine mammals, and can also pose a threat to human health if contaminated seafood is consumed.
Garbage in the ocean harms sea creatures by entangling them, causing injury, or even death. Marine animals can also mistake plastics and other garbage for food, which can cause digestive problems and ultimately lead to starvation.
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Sort the steps used for metabotropic receptor signaling. Drag and drop to o 1 Ligand binds transmembrane receptor 2 Transcription factors are activated 3 otor undergoes a conformational change 4 Gene expression is induced 5 A signaling cascade of effector molecules and second messengers are activated
Transmembrane receptors are bound by ligand. There is a structural mutation as in receptors.
The G-protein is turned on. Effector molecules and second messengers are involved in a signaling cascade.
The activation of transcription factors. Expression of genes is triggered.
A metabotropic receptor is a type of membrane receptor that starts several metabolic processes to control cell activity.
It is also known by the more general term G-protein-coupled receptor. Both metabotropic and ionotropic receptors are used by the neurological system.
Metabotropic receptors are indirectly connected to ion channels by signal transduction systems like G proteins, whereas ionotropic receptors directly produce an ion channel pore.
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What Is Paradoxical Sleep?
Answer:
REM sleep is also referred to as paradoxical sleep because while the brain and other body systems become more active, muscles become more relaxed. Dreaming occurs due to increased brain activity, but voluntary muscles become immobilized.
in the fruit fly, the dominant allele, r, results in red-eye color (vs. white eyes). another gene on another chromosome has a dominant allele, w, that produces long wings (vs. short wings). if a fruit fly has the following genotype: rrww, what can one state about that fruit fly?
Option C: WwRr is the projected genotype of the offspring if a fly that is homozygous dominant for both traits crosses with a fly that is homozygous recessive for both traits.
If you are homozygous for a gene, you inherited two identical copies of that gene. The genotype is heterozygous in reverse, but the alleles are different. Those who are homozygous for that gene will always have recessive traits, such as red hair or blue eyes. An individual human is made up of two chromosomal sets. The terms heterozygous and homozygous, respectively, are used to describe allele pairs. Homozygous individuals are those who have two copies of the same allele (RR or rr). An individual organism with numerous alleles is referred to as being "heterozygous" (Rr). It is known as homozygous or homozygosity when a person inherits all of the genes from both of their biological parents.
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Q 1) Indicate whether the following statements are True (T) or False (F). (a) Unicellular organisms have one-celled body. (T/F).
The question implies that the reply is False. Multiple cells to make up the body of unicellular animals.
What are unicellular animals, exactly?A single cell is known to as a unicellular organism when it accomplishes all the fundamental processes needed for life. Amoeba, Paramecium, and other single-celled microorganisms are a few examples. Moreover, bacteria are mono creatures.
A mushroom — is it just one cell?Structure: Fungi might cell might need to survive, like yeasts do, or a number of cells, like fungi do. The cells that make up the body of multicellular fungus cluster together within rows that simulate the arms of trees. A hypha is a distinct, branching structure (plural: hyphae)
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TRUE/FALSE. All birds can run. An ostrich can run. Therefore, an ostrich is not a bird.
The statement is false as ostrich is a bird and it doesn't state that if a bird can run it is not a bird, as all bird do run. Ostriches are flightless and the fastest bird.
The infra-class Palaeognathae, a complex group of flightless birds commonly known as ratites and include the emus, rheas, and kiwis, contains big flightless birds of the genus Struthio in the order Struthioniformes. Ostriches come in two species: the common ostrich, which is indigenous to much of sub-Saharan Africa, and the Somali ostrich, which is indigenous to the Horn of Africa. Ostriches were widespread in Asia throughout the Late Pleistocene and possibly into the Holocene, reaching as far east as Mongolia. The common ostrich was also previously endemic to the Arabian Peninsula. They are the live land mammal that produces the biggest eggs. They can run at a speed of 70 km/h (43.5 mph), making them the quickest birds on land. Globally, they are raised for food.
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A student observes a cell through a light microscope and correctly decides that it is a plant cell. What observation would lead to that conclusion?
It has a large, central vacuole. Onto the stage, place the glass slide. Make sure the cover slide doesn't move or break when you push it under the clips.
Once the cells are visible, gradually turn the coarse focus knob. When the cells are sharply in focus and visible, steadily turn the fine focus knob. There is no cell membrane in prokaryotic cells. The solution is easy, cells! Cells make up every living thing. In terms of cellular structure, a leaf and a beetle will appear similar when viewed under a microscope. Cells are the fundamental building block of function and structure in all living things, whether they have one or many.
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Leptin, a hunger dampening protein, is secreted by
This hunger-dampening protein is secreted by fat cells option c , also known as adipocytes. Adipocytes are specialized cells that store energy in the form of fat and play a key role in regulating metabolism and energy balance.
Leptin is produced in response to the amount of fat stored in the body. The more fat an individual has, the higher the levels of leptin in their bloodstream. Once leptin is released into the bloodstream, it travels to the hypothalamus, a region in the brain that plays a crucial role in regulating appetite and energy balance.
The hypothalamus is sensitive to the levels of leptin in the bloodstream and uses this information to regulate food intake and energy expenditure. When leptin levels are high, the hypothalamus sends a signal to the body to reduce hunger and increase energy expenditure. On the other hand, when leptin levels are low, the hypothalamus signals an increase in hunger and a decrease in energy expenditure.
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Complete question :
Leptin, a hunger-dampening protein, is secreted by
A) endocrine glands.
B) the stomach.
C) fat cells.
D) the lateral hypothalamus.
A molecular biologist is developing a computer model of the transcription of a gene into rna. which event should be included in the model before transcription occurs?
The correct answer is the binding of RNA polymerase to the promoter, a region close to the gene.
RNA polymerase, also known as DNA-directed/dependent RNA polymerase (DdRP), is an enzyme that produces RNA from a DNA template and is commonly abbreviated as RNAP or RNApol in molecular biology.
Locally, double-stranded DNA is opened by enzyme RNAP using a helicase so that one strand of the exposed nucleotides can serve as a template for the production of RNA, a procedure known as transcription. Before RNAP can start the DNA unwinding at a specific location, a transcription factor and its accompanying transcription mediator complex must be linked to a DNA binding site known as a promoter region.
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Select the choices that represent proper matches between an organelle and its function in a eukaryotic cell. Check all that apply.
Check All That Apply
Nucleolus, synthesizes DNANucleolus, synthesizes DNA
Golgi apparatus, protein modification and production of condensing vesiclesGolgi apparatus, protein modification and production of condensing vesicles
Rough endoplasmic reticulum, synthesis of lipidsRough endoplasmic reticulum, synthesis of lipids
Smooth endoplasmic reticulum, storage of lipids and other nonprotein macromolecules
In eukaryotic cells, different organelles have specific functions to carry out various processes. The synthesizes rough endoplasmic reticulum, the Golgi apparatus modifies proteins and produces condensing vesicles.
The rough endoplasmic reticulum synthesizes lipids and other proteins, and the smooth endoplasmic reticulum stores lipids and other nonprotein macromolecules. These organelles work together to keep the cell functioning properly. The proper matches between organelles and functions in eukaryotic cells are: Nucleolus: synthesizes RNA, Golgi apparatus: protein modification and production of condensing vesicles Rough endoplasmic reticulum: synthesis of lipids and other proteins. Smooth endoplasmic reticulum: storage of lipids and other non protein macromolecules.
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Can cholesterol pass through the lipid bilayer?
At high temperatures, cholesterol may penetrate through the lipid bilayer.
As cholesterol seems to have a smaller hydrophilic head, it is less effective at concealing hydrophobic interactions. The lipid bilayer can tolerate this at high temperatures, but at low temperatures, the lipids can only help to cholesterol screening by lowering its area per lipid. Cholesterol affects the bilayer structure of biological membranes in a variety of ways.
It alters lipid bilayer fluidity, thickness, compressibility, water penetration, and intrinsic curvature. Cholesterol creates phase separations in multi-component lipid mixtures, partitions selectively between distinct coexisting lipid phases, & causes integral membrane proteins to respond by altering conformation or redistribution in the membrane.
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Based on the table of rock characteristics and your knowledge of the rock cycle, in which type of rock (igneous, metamorphic, or sedimentary) would you expect to find bubbles or a smooth, glassy surface? Why?
The type of rock that would be expected to find bubbles or a smooth, glassy surface is igneous rock. The correct option is a.
What is an igneous rock?When lava or magma cools and solidifies, igneous rock is created. The planet's mantle or crust can partially melt existing materials to create magma.
From the magma that exists beneath the earth's surface, intrusive rocks form. Extrusive or volcanic rocks form from lava at the surface of the earth. The minerals that are present determine the igneous rock's name.
Therefore, the correct option is a. igneous rock.
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although most organs are innervated by both sympathetic and parasympathetic nerves, some-including the__
sympathovagal nervous system Sympathetic nerves innervate major arteries and precapillary arterioles, but they hardly ever innervate venules, capillaries, or collecting veins.
What innervated by sympathetic nerves?The adrenal medulla, the arrector pili muscles, the sweat glands, and the majority of blood vessels are among the organs that solely receive sympathetic innervation, Despite the fact that sympathetic and parasympathetic neurons innervate the majority of the body's organs.
In these circumstances, regulation is accomplished by altering the sympathetic fibres' tone (rate of firing).
Therefore, although most organs are innervated by both sympathetic and parasympathetic nerves, some-including the adrenal medulla, arrector pili muscles, sweat glands, and most blood vessels —receive only sympathetic innervation.
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sympathovagal nervous system Sympathetic nerves innervate major arteries and precapillary arterioles, but they hardly ever innervate venules, capillaries, or collecting veins.
What innervated by sympathetic nerves?The adrenal medulla, the arrector pili muscles, the sweat glands, and the majority of blood vessels are among the organs that solely receive sympathetic innervation, Despite the fact that sympathetic and parasympathetic neurons innervate the majority of the body's organs.
In these circumstances, regulation is accomplished by altering the sympathetic fibres' tone (rate of firing).
Therefore, although most organs are innervated by both sympathetic and parasympathetic nerves, some-including the adrenal medulla, arrector pili muscles, sweat glands, and most blood vessels —receive only sympathetic innervation.
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Which of the follow indicates the mean number per cross of F2 plants producing medium-red grain and correctly explains the distribution of the phenotypes?
A cross produces 20.8 medium-red phenotypes on average. The range of phenotypes shows that different genes contribute to the development of grain color.
A) There are 20.8 medium-red phenotypes on average per cross. The distribution of phenotypes shows that environmental factors affect grain color.
B) There are 20.8 medium-red phenotypes on average per cross. The range of phenotypes shows that different genes contribute to the development of grain color.
C) There are typically 104 medium-red phenotypes produced by each cross. The distribution of phenotypes shows that environmental factors affect grain color.
D) There are 104 medium-red phenotypes on average per cross. The range of phenotypes shows that different genes contribute to the development of grain color.
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1. If a bear eats a raspberry by the river, then climbs back up the mountain and poops a mile away, that raspberry bush just did a great job of spreading its seeds and creating new offspring!
A scientific experimental must be designed in a way that it could be able to test the predicted hypothesis.
What is experiment?An experiment must divide the samples into two groups: the experimental design in which the independent variable will influence the dependent variable and the control group in which the variable to be tested is skipped.
The independent variable does not influence the dependent variable. Control group provides a reference to the experimental group, therefore, is considered important.
Therefore, A scientific experimental must be designed in a way that it could be able to test the predicted hypothesis.
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which of the following is a true statement regarding assessment of pain or distress in mice?
Mice frequently display minor changes in their behavior and activity level when they are in pain or suffering. A mouse that experiences little pain could appear and act normally.
To the greatest extent possible, precise assessments of the presence or absence of pain are necessary for the proper management of pain in laboratory rodents. Because laboratory rodents are a prey species that may exhibit minor symptoms of discomfort, this can be difficult in some circumstances. Mice should be closely watched throughout the procedure to assess their level of anesthetic, cardiovascular health, and respiratory function. Under general, animals in pain are less active, though this is not always the case. Back-arching, belly-pressing, twitching, and staggering are further aberrant actions. Knowing how to differentiate between normal and atypical animal behavior is essential for determining whether there is pain or suffering.
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