The minimum voltage needed to generate muscle contraction is called the threshold voltage. So, option D is correct.
The threshold voltage is the lowest voltage needed to sufficiently depolarize the membrane of the muscle cell in order to produce an action potential and cause a muscle contraction. For skeletal muscle cells, this voltage usually ranges between -50 and -55 millivolts (mV).
A muscle can produce a complete muscular contraction when stimulated with a voltage over the threshold voltage. The stimulus voltage or activation voltage is what is referred to as this voltage. The voltage needed to recruit new muscle fibers is known as the recruitment voltage, whereas the voltage needed to maintain a prolonged muscular contraction is known as the contraction voltage.
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A couple is expecting a child. The fetus undergoes genetic testing and the couple discover the fetus has sickle cell anemia. The couple ask the nurse how this happened. Which statement is accurate for the nurse to provide? a."Sickle cell anemia can be passed to the fetus in many ways. We will know more at birth."
b."Sickle cell anemia is passed to a fetus when one of the parents has the gene."
c."Sickle cell anemia occurs from a random genetic mutation."
d."Sickle cell anemia is passed to a fetus when both parents have the gene."
The nurse should inform the couple that (d) "Sickle cell anemia is passed to a fetus when both parents have the gene". Therefore, option d is the accurate statement for the nurse to provide.
Sickle cell anemia is an inherited blood disorder. It causes the production of abnormally shaped red blood cells, which become sticky and rigid and may get stuck in small blood vessels in the body. This can cause severe pain and organ damage, as well as increase the risk of infection, stroke, and other complications.
The technique of genetic testing is used to detect gene mutations that cause various disorders. In the case of sickle cell anemia, it is caused by a mutation in the gene that is responsible for making hemoglobin, the protein that carries oxygen in the blood. When both parents have a copy of the mutated gene, their child is at risk of inheriting sickle cell anemia.
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Which of the following individuals used X-ray diffraction to determine that DNA was helical, the distance between base pairs, the length of one turn of the DNA helix, and the diameter of DNA?Select one or more:Watson Franklin Crick Avery MacLeod Griffeths Chargaff McCarty Wilkins
The individual who used X-ray diffraction to determine that DNA was helical, the distance between base pairs, the length of one turn of the DNA helix, and the diameter of DNA was Rosalind Franklin. Therefore, the correct answer is Franklin.
Rosalind Elsie Franklin was an English scientist who contributed greatly to the understanding of molecular structures and is best known for her work on X-ray diffraction images of DNA, leading to the discovery of DNA's double helix structure. Franklin's work on DNA was published in the same issue of Nature as Watson and Crick's paper describing the double helix. Despite being the first to create a clear image of the structure of DNA, Franklin was not recognized for her work during her lifetime.
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Once it enters the cytoplasm of a host cell and sheds its capsid, replication of HIV begins when _____ _____ is used to synthesize a double strand of DNA from the viral RNA.
Once it enters the cytoplasm of a host cell and sheds its capsid, replication of HIV begins when reverse transcriptase is used to synthesize a double strand of DNA from the viral RNA.
Once it enters the cytoplasm of a host cell and sheds its capsid, replication of HIV begins when reverse transcriptase is used to synthesize a double strand of DNA from the viral RNA.
What is HIV?HIV stands for Human Immunodeficiency Virus, a virus that attacks and weakens the immune system of humans. HIV replicates in the host cell cytoplasm after shedding its capsid, and it is called replication. When the reverse transcriptase enzyme is used to create a double-stranded DNA from the viral RNA, replication begins. HIV attacks the T-helper cells in the immune system, which are in charge of defending the body against foreign invaders. HIV gets into the bloodstream and travels to the CD4 T-helper cells after being contracted. The virus begins to reproduce after it has entered the host cell's cytoplasm. The viral RNA then acts as a template for reverse transcriptase, an enzyme that catalyzes the creation of a DNA copy of the RNA. The RNA template is destroyed and a second DNA strand is created by the same enzyme, reverse transcriptase. This second DNA strand is complementary to the first and forms a double-stranded DNA molecule.
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Do the following statements describe actin, myosin, both of the proteins or neither of the proteins?
contains a binding site for calcium
found in the I band
exists in a globular (G) form and a filamentous (F) form
Contains a binding site for ATP
is a component of the thin filament
is a component of the thick filament
Answers:
A. actin
B. myosin
C. neither actin nor myosin
D. both actin and myosin
Contains a binding site for calciumfound in the I bandexists in a globular (G) form and a filamentous (F) formContains a binding site for ATP is a component of the thin filamentis a component of the thick filament. The answer is: D. both actin and myosin
The statement contains a binding site for calcium, both actin and myosin contain a binding site for calcium. Found in the I band, Only actin is found in the I-band of the sarcomere. Exists in a globular (G) form and a filamentous (F) form, both actin and myosin exist in a globular (G) form and a filamentous (F) form.
Contains a binding site for ATP, both actin and myosin contain a binding site for ATP. A component of the thin filament, then actin is a component of the thin filament. A component of the thick filament, tand myosin is a component of the thick filament.
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which mutation is least likely to affect the corresponding protein? group of answer choices nonsense mutation missense mutation frameshift mutation mutation that deleted the entire gene
A nonsense mutation is least likely to affect the corresponding protein.
What is a mutation?A mutation is a sudden, unexpected transformation in genetic information that occurs naturally over time or is triggered by environmental factors. As a result, mutations can have a variety of impacts on proteins. A mutation in DNA may have no effect, a moderate effect, or a severe effect on the protein it encodes. Mutations may be classified as silent mutations, missense mutations, nonsense mutations, frameshift mutations, and other types of mutations.
They may arise spontaneously as a result of replication errors or as a result of exposure to various DNA-damaging agents.Mutations that are least likely to impact the corresponding protein: The following are the types of mutations that are least likely to impact the corresponding protein:
nonsense mutationMissense mutationSilent mutationTherefore, the correct answer is a nonsense mutation. A nonsense mutation is a type of mutation that transforms an amino acid coding codon into a stop codon. As a result, a short, incomplete protein is produced. Because of the generation of a premature stop codon, this protein lacks vital functional domains. Nonsense mutations are much less likely to have an effect on the corresponding protein than other types of mutations.
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vasoconstriction of blood vessels delivering blood to the gut is a likely response when an individual is
Vasoconstriction of blood vessels that supply blood to the gut is a likely response when an individual is under stress or in a fight-or-flight situation.
When the body perceives a threat, the sympathetic nervous system activates, leading to the release of adrenaline and other stress hormones. These hormones cause vasoconstriction of blood vessels in certain parts of the body, including the gut, in order to redirect blood flow to areas that are more essential for survival, such as the heart, lungs, and muscles.
This response is an evolutionary adaptation that allows the body to respond quickly to potential danger, by increasing heart rate and blood pressure, and providing more oxygen and glucose to vital organs and tissues. However, prolonged or chronic stress can lead to dysfunction of the stress response system and may contribute to various health issues.
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how do organisms obtain and use the matter and energy they need to live and grow?
Organisms obtain and use the matter and energy they need to live and grow by food, nutrients, or sunlight in order to carry out cellular processes.
Energy is a necessity for all living things to live. During the act of breathing, they get their energy. Breathing and oxygen-fueled food breakdown within cells are both components of respiration, which releases energy.
Energy is needed for an organism to survive in order to support its essential life processes. Depending on the best survival tactics, organisms must make specific decisions. It begins with the transmission of genetic information through reproduction from one generation to the next.
The molecular mechanisms linked to survival that contribute to the maintenance of life follow next. Nutrition is a crucial component of living since it provides the energy the body needs. Last but not least, a vital component of survival is the efficient operation of the senses and reactions, as well as the development of a lifestyle in a habitat.
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What is the metabolic profile? What determines the metabolic profile of a given bacterial species?
The metabolic profile of a given bacterial species is a combination of both its genetic makeup and the particular environment in which it resides.
The metabolic profile of a bacterial species is a collection of metabolic pathways and their respective enzymes that are responsible for producing energy, synthesizing proteins and other important molecules, and degrading various components of the environment. This profile is determined by the particular bacteria’s genetic makeup, meaning that each species has a unique set of metabolic pathways. These pathways are typically specific to the species and do not vary much between strains within the same species. Furthermore, the metabolic profile of a species can be modified by various environmental factors, such as temperature, light, and nutrient availability.
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a triglyceride is composed of three fatty acids attached to a backbone.
A triglyceride (TG, triacylglycerol, TAG, or triacylglycerol) is a molecule made up of glycerol and three different fatty acids (from tri- and glyceride). Triglycerides are the primary components of human and other mammal bodily fat, as well as vegetable fat. Glycerol is combined with three fatty acid units to create triglycerides.
A triglyceride (TG, triacylglycerol, TAG, or triacylglycerol) is a molecule made up of glycerol and three different fatty acids (from tri- and glyceride). Triglycerides are the primary components of human and animal bodily fat, as well as veggie fat. ... Glycerol is combined with three fatty acid units to create triglycerides. Triglycerides cannot easily travel through cell membranes. Lipoprotein lipases, which are enzymes found on the walls of blood arteries, must break down lipids into free fatty acids and glycerol. Fatty acids can then be taken up by cells via the fatty acid transporter
Triglycerides are not polymers, and fatty acids and glycerol are not monomers because fatty acids and glycerol do not form repetitive chains like other monomers
extrachromosomal dna is critical to the antibiotic resistance found in microorganisms, how do these dna elements account for this phenomena?
Extrachromosomal DNA is critical to the antibiotic resistance found in microorganisms. These DNA elements account for the phenomena by providing resistance genes that can be shared among bacteria, allowing them to survive exposure to antibiotics.
What are Extrachromosomal DNA?Extrachromosomal DNA are also known as plasmids, and these can be passed between bacteria through a process called conjugation. This allows resistance genes to be shared between bacteria, increasing the prevalence of antibiotic-resistant strains. In addition, some extrachromosomal DNA contains genes that produce enzymes that can break down antibiotics, rendering them ineffective against the bacteria carrying these genes. This is known as enzymatic resistance.
Extrachromosomal DNA can also provide bacteria with the ability to pump antibiotics out of their cells more effectively, preventing the antibiotics from reaching their intended targets within the bacteria. This is known as efflux-mediated resistance. In summary, extrachromosomal DNA plays a critical role in the development of antibiotic resistance in microorganisms. By providing resistance genes that can be shared between bacteria, producing enzymes that break down antibiotics, and increasing the ability of bacteria to pump antibiotics out of their cells, extrachromosomal DNA allows bacteria to survive exposure to antibiotics.
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what is the common molecule involved in the catabolism of proteins, fats, and carbohydrates?
The common molecule involved in the catabolism of proteins, fats, and carbohydrates is adenosine triphosphate (ATP).
ATP is a molecule that provides energy for cellular processes, and it is created during the breakdown of these macromolecules. Proteins are broken down into their constituent amino acids, which can be further broken down into intermediates that enter into cellular respiration pathways. Fats are broken down into fatty acids and glycerol, which can also be used in cellular respiration. Carbohydrates are broken down into glucose, which enters into glycolysis, a cellular respiration pathway. ATP is produced during the electron transport chain of cellular respiration, providing energy for various cellular processes.
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A girl walks from her home to a friend’s home 3 blocks north. She then walks 2 blocks east to the post office. 1 block north to the library, and one block east to the park. From the park, she walks 2 blocks west to the movie theater. After the movie, she walks 4 blocks south to the pet store. What is the girls displacement from her starting point to the pet store? Where is the location of the pet store in relation to her home? Calculate the distance she walked in blocks.
how long does it take a venus flytrap to digest a fly
In an enveloped virus, the ___ found in the viral envelope are derived from the host cell whereas the ___ found in the viral envelope are generally virally encoded.
In an enveloped virus, the glycoproteins found in the viral envelope are derived from the host cell whereas the matrix proteins found in the viral envelope are generally virally encoded.
What is an enveloped virus?
An enveloped virus is a virus that is covered by a lipid envelope that contains glycoproteins. The lipid envelope is a combination of host and viral components that is formed by budding through cellular membranes. The lipid envelope is thought to be derived from host cell membranes in the majority of enveloped viruses, and it is necessary for viral particle transmission, infection, and replication.
The virus's genome is surrounded by a capsid or core structure, which is then surrounded by a protein shell known as the matrix. Finally, the lipid envelope, which is created from the host cell's plasma membrane as the virus buds from it, surrounds it. The enveloped viruses contain matrix proteins and glycoproteins. Matrix proteins and glycoproteins in enveloped viruses are different. Matrix proteins are usually encoded by the virus, while glycoproteins are typically derived from the host cell.
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The cells of the immune systema) move from one part of the body to another via the body's circulatory systemsb) descend from tissue cells & therefore stay in the tissues where they developed
The cells of the immune system move from one part of the body to another via the body's circulatory systems.
The immune system is a complex network of cells, tissues, and organs that function together to protect the body from infections and diseases. It has evolved over millions of years to defend the body against an array of pathogens, including viruses, bacteria, fungi, and parasites.The immune system is composed of several types of cells, including white blood cells (leukocytes), which are produced in bone marrow and distributed throughout the body via the circulatory system. These cells, which include B cells, T cells, and natural killer cells, all have specialized functions in the immune system.White blood cells leave the bloodstream and migrate into tissues where infections have arisen. Phagocytic cells (macrophages, neutrophils) remove dead cells and microorganisms. In response to stimulation by pathogens or inflammation, white blood cells can squeeze through the walls of blood vessels and enter tissues in search of foreign substances or damaged cells.In conclusion, the cells of the immune system move from one part of the body to another via the body's circulatory systems.Learn more about immune system: https://brainly.com/question/15595309
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You have learned that both biotic and abiotic factors affect ecosystems. Give some examples of each, and explain how biotic and abiotic factors could have affected the tortoises that darwin observed on the galápagos islands
Biotic factors are living components of an ecosystem, and examples include plants, animals, fungi, and bacteria. Abiotic factors are non-living components of an ecosystem, and examples include water, temperature, sunlight, and soil composition.
In the case of the tortoises that Darwin observed on the Galápagos Islands, both biotic and abiotic factors could have affected their survival and evolution. The availability of food, water, and shelter on the island would be an example of abiotic factors. Tortoises evolved different shell shapes and sizes to adapt to their environment's abiotic factors, such as droughts or heavy rains.
The biotic factors, such as the availability of vegetation, would have influenced their survival and reproduction. The presence of predators, competitors, and other tortoise species would have also affected their evolution. For instance, some tortoise populations may have developed longer necks and legs to reach higher foliage, while others may have evolved faster movement abilities to escape predators or competitors.
Overall, both biotic and abiotic factors played a significant role in shaping the evolution and survival of the tortoises on the Galápagos Islands. The interplay between these factors is vital in understanding how ecosystems function and how organisms adapt to their environment.
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which of these conditions are always true of populations evolving due to natural selection? condition 1: the population cannot vary in traits that are heritable. condition 2: some heritable traits must increase reproductive success. condition 3: individuals pass on most traits that they acquire during their lifetime.
Condition 2: Some heritable traits must increase reproductive success is always true of populations evolving due to natural selection. Heritable traits are those traits that are passed on from parents to offspring, and they can vary within a population. Those traits that increase reproductive success are more likely to be passed on to future generations and will become more prominent in the population over time.
Which of these conditions are always true of populations evolving due to natural selection?
Of the given conditions, the only one that is always true of populations evolving due to natural selection is "condition 2: some heritable traits must increase reproductive success."Natural selection is a natural process that allows individuals that have beneficial traits to survive and reproduce, passing those traits down to their offspring. This process allows populations to evolve over time to better adapt to their environment and increase their chances of survival.There are certain conditions that must be met for natural selection to occur, but not all of them are always true. For example, it is not true that "the population cannot vary in traits that are heritable," as variation is actually necessary for natural selection to occur. In addition, it is not always true that "individuals pass on most traits that they acquire during their lifetime," as only traits that are heritable can be passed down from one generation to the next.
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MULTIPLE CHOICE QUESTION
Which of the following are components of most
viruses? Select all that apply.
A. Lipid envelope
B. Cell wall
C. Attachment proteins or
envelope proteins (sometimes
also called virus spikes)
D. protein capsid which contains.
the genetic material.
E. DNA or RNA as genetic
material
Following are the components of most viruses : A. Lipid envelope; C. Attachment proteins or envelope proteins (sometimes also called virus spikes); D. Protein capsid which contains the genetic material; E. DNA or RNA as genetic material
What are the components of viruses?Components A, C, D, and E are found in most viruses. However, component B, the cell wall, is not found in viruses as they are acellular and do not have cell walls.
Viruses are composed of a nucleic acid, RNA or DNA but never both. - All viruses have protein coat or shell that surrounds and protects the nucleic acid core. Some viruses have lipid envelope or membrane surrounding nucleocapsid core and the source of the envelope is from membranes of the host cell.
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ASAP PLS
1. In the stem of a plant that is bending toward the light, auxins are most concentrated in:
1. the top surface of the leaves
2. the bottom surface of the leaves
3. the side of the stem facing the light
4. the side of the stem away from the light
2. Which organism has a distinct central nervous system?
1. starfish
2. jellyfish
3. crayfish
4. clam
Auxins are primarily concentrated on the side of a plant stem that is bending in the direction of the light. Crayfish is an organism with a unique central nervous system.
What portion of the plant concentrates auxin?As a result, even though auxins are present in all plant tissues, their concentration is highest at the plant's top and declines towards the roots.
Which side of the stem contains the most auxin?Auxins are distributed throughout plants under typical lighting conditions. Nevertheless, auxin is broken down on the stem's sunnier side when the amount of sunshine varies. The plant cells on the shady side grow more due to the higher auxin content, causing it to bend towards the light.
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The kidneys help to regulate blood pressure by:A. retaining key electrolytes, such as potassium.B. eliminating toxic waste products from the body.C. removing sodium, and thus water, from the body.D. accommodating a large amount of blood volume.
Answer:
option C
Explanation:
The kidneys regulate circulatory volume by controlling sodium and water balance
regulation by induction and repression are called negative control because __________.
Regulation by induction and repression are called negative control because they both involve the suppression of gene expression.
The repression of gene expressed occurs when a patch, frequently a protein, binds to a gene and prevents its expression, or when a gene is actuated by a patch, but the gene product isn't made. In both cases, gene expression is inhibited, which is why these nonsupervisory processes are considered negative control.
In negative control, the gene is suppressed by a nonsupervisory patch, similar as a recap factor, which binds to the gene and prevents it from being expressed. This is known as suppression. Alternately, the gene may be actuated by a nonsupervisory patch, similar as an activator protein, which binds to the gene and allows it to be expressed.
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which tissue uses peristalsis to help move food along the digestive tract
The smooth muscle tissue uses peristalsis to help move food along the digestive tract.
Peristalsis is a wave-like contraction of smooth muscles in the gastrointestinal tract that pushes food and other contents forward. This is how food travels through the digestive tract in our bodies. In the digestive tract, smooth muscles are found in the esophagus, stomach, small intestine, and colon.The smooth muscle tissue that lines the digestive tract is responsible for performing the task of peristalsis. Peristalsis is the rhythmic contraction and relaxation of the smooth muscle in the digestive tract that aids in the digestion of food and the movement of waste through the intestines.The muscles in the walls of the digestive tract push the food along in a wave-like motion. The movement of food down the digestive tract is controlled by the nervous system. As food is broken down by enzymes in the digestive tract, it is slowly moved down the tract by peristalsis. The waste product that remains after the food is broken down is eliminated from the body through the anus.
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an antiport transports sodium into the cells of the pct while pumping hydrogen ions out. what hormone activates this transport?
The hormone that activates this transport would be the Angiotensin II at the proximal convoluted tubules.
What is proximal convoluted tubule (PCT)?The proximal convoluted tubule (PCT) is one of the three major parts of the nephron which is the functional unit of the kidney.
The proximal convoluted tubule (PCT) is responsible for the reabsorption and secretion of various solutes and water.
It carries out this function by the antiport which is activated by the hormone Angiotensin II that helps to transports sodium into the cells of the PCT while pumping hydrogen ions out.
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Which Process Is NOT Part of The Carbon Cycle?
A: Predation
B:Photosynthesis
C: Transpiration
D: Respiration
Answer: C: Transpiration
Photosynthesis, burning of fossil fuel, and respiration is involved in the carbon cycle, transpiration is not involved in the carbon cycle.
Answer:
c
Explanation:
Complete the sentences by dragging the correct organs or structures to the appropriate blanks. Answers may be used more than once. Not all answers will be used. Used bile salts are absorbed in the ____. This organ recycles the bile salts to used bile salts enter the make new II present in chyme, it can interfere with the recycling of used blle salts. As a result, the used bile salts are in _____ When there is a lack of recycled blle salts, the from the bloodstream to make new ___ uses
Used bile salts are absorbed in ileum. This organ recycles bile salts to the liver. If there is excess fat present in chyme, it can interfere with recycling of used bile salts. As a result, used bile salts are in lower concentration. When there is lack of recycled bile salts, liver takes up more cholesterol from bloodstream to make new bile salts.
What are bile salts?Bile salts play key role in hepatobiliary and intestinal homeostasis and digestion. The liver synthesizes primary bile salts from cholesterol and enzymatic modifications during their enterohepatic circulation lead to the formation of secondary and tertiary bile salts. The solubilization of dietary lipids and fat-soluble nutrients are the main digestive functions of bile salts.
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Select all the components of the vertebrate circulatory system. -heart -blood -vessels.
The vertebrate circulatory system consists of the heart, blood, and vessels.
The heart pumps blood through the vessels to deliver oxygen and nutrients to cells throughout the body. The blood carries oxygen and other gases, nutrients, hormones, and waste products to and from the body’s cells. The vessels, including arteries, veins, and capillaries, are the pathways for the blood to travel through the body. The arteries transport blood away from the heart and veins transport blood back to the heart. The capillaries provide a network of tiny vessels that connect arteries to veins and allow oxygen and other substances to be exchanged between the blood and cells. Together, these components form a closed loop that circulates oxygen, nutrients, and other substances throughout the body.
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Which example is an abiotic factor of a desert environment?
* rattlesnake
* scorpion
* cactus
* sand
Answer:
Which example is an abiotic factor of a desert environment?
* rattlesnake
* scorpion
* cactus
* sand
Explanation:
Sand is an abiotic factor of a desert environment. Abiotic factors are non-living physical and chemical components of an ecosystem, such as water, sunlight, soil, and temperature.
support cells in the central nervous system are collectively called
Support cells in the central nervous system are collectively called neuroglia, or simply glial cells (glia = glue).
The source of nerve impulses is a neuron, a nerve cell with all of its activities. The most prevalent kind of supporting cell is this one. They take part in the metabolic exchange between blood and neurons. Provide neurons a supporting framework and cover all of their non-synaptic components. Non-neuronal cells called neuroglia or glial cells assist and protect neurons in the central nervous system (CNS) and peripheral nervous systems by forming myelin, maintaining homeostasis, and other functions (PNS).
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Supporting cells of the nervous system are collectively called _
A. Depolarization
B. Synapse
C. Endorphins
D. Peripheral nervous system
E. Hyperpolarization
F. Neuroglia
a thick rigid barrier found outside of the cell membrane in plant cells
Cell-Wall is a thick rigid barrier found outside of the cell membrane in plant cells. A cell wall is a thick, stiff layer that surrounds the cell and is located outside the cell membrane.
In addition to cellulose and protein, the cell wall also contains additional polysaccharides. The cell wall offers structural defense and support. Certain cell types have a stiff, partially permeable protective coating called a cell wall. In the majority of plant cells, as well as those of fungi, bacteria, algae, and certain archaea, this outer layer is situated close to the cell membrane (plasma membrane).
Nevertheless, animal cells lack a cell wall. A plant cell's cell wall is its outermost layer. It protects the cell while stiffening it. Cell walls are absent from animal cells. Every cell has a membrane around it as a form of defense.
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Correct Question:
_____ is a thick rigid barrier found outside of the cell membrane in plant cells.
two genes, u and h, affect wing development in a species of flying pigs, where some pigs have wings and some do not. pigs with wings are always homozygous at gene u (u1u1). among pigs with wings, allele h4 codes for grey feathers and is dominant over allele h5, which codes for white feathers. which of the following best describes this scenario? group of answer choices A. duplicate recessive epistasis B. recessive epistasis of u over h C. duplicate dominant epistasis D. recessive epistasis of h over u E. dominant epistasis of h over u F. dominant epistasis of u over h
The scenario that was described of the effect of gene u on gene h is an example of recessive epistasis of u over h.
The correct option is C.
What is recessive epistasis?This type of epistasis, where one gene masks the expression of another gene, is known as recessive epistasis of u over h.
The fact that pigs with wings are always homozygous at gene u (u1u1) suggests that the presence of this allele is necessary for wing development. In addition, the presence of the homozygous recessive genotype (u2u2) likely results in no wing development.
The fact that allele h4 codes for grey feathers and is dominant over allele h5, which codes for white feathers, suggests that the expression of h determines feather color in pigs with wings. Therefore, the expression of h is dependent on the presence of the u1 allele.
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