The statement is true. Muscles are attached to bones through tendons, which are composed of dense regular connective tissue made primarily of collagen fibers.
The tendons attach to the periosteum, which is the outer layer of bone, and the perforating fibers of collagen attach the tendons and periosteum to the cortical surfaces of the bone.
The perforating fibers, also called Sharpey's fibers, are bundles of collagen fibers that extend from the periosteum into the cortical bone. They anchor the tendons to the bone and provide a strong attachment that resists tearing and pulling forces.
When a muscle contracts, it exerts force on the tendon, which in turn pulls on the bone to produce movement. The strong attachment between the tendon and bone provided by the perforating fibers is crucial for allowing this movement to occur without tearing the muscle away from the bone.
In summary, the perforating fibers of collagen fibers that attach tendons and periosteum to the cortical surfaces of bone play an important role in preventing muscles from tearing away from their attachment points.
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Fill the Blank? food is moved through the gi tract by muscular waves called______
Food is moved through the GI tract by muscular waves called peristalsis.
Peristalsis is a radially symmetrical contraction and relaxation of muscles that travels anterogradely, in the form of a wave down a tube. Peristalsis is a coordinated progression of involuntary circular muscles that contract and relax at the same time in the gut lining. This process is preceded by a simultaneous contraction of the longitudinal muscle and relaxation of the circular muscle.
Most of the smooth muscle tissue in a digestive system, like the human gastrointestinal tract, contracts sequentially to create a peristaltic wave, which drives a ball of food along the tract. Circular smooth muscles relax first, then contract behind the chewed item to prevent it from traveling backward, and finally, longitudinal smooth muscles contract to drive the object forward.
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based on the β-globin alignment, identify the best hypothesis about how humans are related to monkeys and gibbons.
The best explanation for how humans are related to monkeys and gibbons based on the -globin alignment is that gibbons are more closely connected to humans than monkeys since the gibbon -globin sequence matches the human sequence more closely.
The hemoglobin gene genes for a protein component that is necessary for red blood cells to carry oxygen. It is possible to compare the -globin sequences of humans, monkeys, and gibbons to find parallels and differences that reveal their evolutionary links.
In this instance, the percentage of identity between the globin sequences of gibbons and humans is higher than it is between monkeys and humans, indicating that gibbons are more closely related to humans than monkeys are. This is so because two sequences with a higher percent of identity likely share a more recent common ancestor.
The complete question is:-
Based on the β-globin alignment, identify the best hypothesis about how humans are related to monkeys and gibbons.
a. Both monkeys and gibbons are equally related to humans because they both have less than a 10% difference in β-globin sequence with humans
b. Both monkeys and gibbons are equally unrelated to humans because neither monkeys nor gibbons have the exact same β-globin sequence as humans
c. Gibbons are more closely related to humans than monkeys are because the gibbon β-globin sequence is a closer match with the human sequence
d. Monkeys are more closely related to humans than gibbons are because the monkeys' β-globin sequence has the lower percent identity with humans
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which of the following describes one of the functions of lipids in living organisms? multiple choice question. store genetic information used to make proteins provide a short-term source of energy provide long-term storage of energy transport oxygen in the bloodstream
Your body uses carbohydrates as its primary energy source to power your heart, kidneys, brain, myocardium, and central nervous system.
For instance, fibre is a carbohydrate that promotes healthy blood cholesterol levels, helps with digestion, and makes you feel full. How Carbohydrates Work. energy provision and control over blood sugar. protein used gently to create energy. fatty acid degradation and ketosis prevention. Process of biological recognition. sweeteners and tastes. fibre. Lipids and carbs are both used to store energy. Carbohydrates are utilised for short-term storage, but lipids are used for long-term storage and may hold twice as much energy. In human bodies, proteins have numerous functions. They are utilised for metabolic processes, body function coordination, and tissue growth and repair. Additionally, they keep the right pH and fluid balance.
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what is the kingdom that contains single-celled organisms that live in extreme environments?
The kingdom that contains single-celled organisms that live in extreme environments is archaea.
A single cell makes up a unicellular creature, also known as a single-celled organism, as opposed to a multicellular organism, which is made up of many cells. Similar to Eukarya, Archaea have RNA polymerases that are more complex than those of bacteria.
Comparatively speaking to bacteria, archaea do not have peptidoglycan in their cell walls. Compared to bacteria and eukarya, archaea's membrane lipid bonding is different.
Existing genetic variations. Archaea also possess RNA polymerases that are more complex than those found in bacteria, similar to Eucarya. Comparatively speaking to bacteria, archaea do not have peptidoglycan in their cell walls. Compared to bacteria and eukarya, archaea's membrane lipid bonding is different. Existing genetic variations.
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Arrange the following terms into the order in which a compound must pass through to move from plasma to CSF. Drag and drop options into correct order and submit. For keyboard navigation SHOW MORE O Pericyte O Capillary endothelium O Extracellular matrix O Astrocyte Unanswered.
While glucose, amino acids, and cations are transported via carrier-mediated processes, water, gases, and lipid soluble compounds can freely move from the plasma into the CSF.
Capillary endothelium, Extracellular Matrix, Pericyte, and Astrocyte are the cells that a compound must pass through before it reaches the CSF from the plasma.
The arachnoid granulations absorb the majority of the cerebrospinal fluid (CSF) into the venous system. The protrusions of the arachnoid mater that pierce the dura mater and protrude into the lumina of the dural venous sinuses are known as arachnoid granulations.
Three primary purposes of cerebral spinal fluid include: Trauma protection for the brain and spinal cord.
nourish the tissue of the nervous system.
Clear the cerebral metabolism of waste.
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The above question is incomplete. Check complete question below -
Arrange the following terms into the order in which a compound must pass through to move from plasma to CSF. -
Capillary endotheliumBasal LaminaPericyteAstrocytewhat feature of phospholipids allows them to interact with aqueous cytosol and extracellular fluid, while still presenting a barrier to hydrophilic substances
Phospholipids are important components of biological membranes, which divide the insides of cells or organelles from their surroundings. Phospholipids' unique structure allows them to interact with aqueous cytosol and extracellular fluid while still presenting a barrier to hydrophilic substances.
Phospholipids have a hydrophilic head and a hydrophobic tail. A phosphate group is often coupled to a small polar molecule such as choline or serine as the head group. The hydrophobic tail is typically made up of two nonpolar and hydrophobic fatty acid chains of varied length and saturation.
When phospholipids are exposed to water molecules, the hydrophilic head group attracts them and interacts with the surrounding fluid. Water repels the hydrophobic tail, which prefers to cluster together away from the aquatic environment. As a result, a lipid bilayer forms, with the hydrophobic tails facing each other and the hydrophilic head groups facing outward towards the cytosol and extracellular fluid.
The hydrophobic core of the lipid bilayer forms a barrier that inhibits hydrophilic entities such as ions and polar molecules from passing through the membrane. Small hydrophobic molecules like oxygen and carbon dioxide, on the other hand, can permeate through the lipid bilayer.
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How is transcription similar to DNA synthesis?
In both process DNA Replication and Transcription involve the generation of a new copy of the DNA in a cell.
DNA transcription mostly works by replicating the DNA into RNA, on the other hand DNA replication are involved in making another copy of DNA. These processes together get involved in the synthesis of new nucleic acids these are DNA or RNA.
Also ,DNA replication is the process of making two daughter strand where each daughter strand has a half of the original DNA double helix. While process of Transcription carries the synthesis of RNA using DNA as a template.
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how do retrotransposons differ from other transposons?
Transposons in DNA are copied and pasted to migrate. While, the Retrotransposons, on the other hand, replicate the element and copy it into a new chromosomal site using an intermediary RNA.
The Retrotransposons multiply more quickly than DNA transposons, as a result.The Retroelements depend on an RNA transcript that is retro transcribed by a reverse transcriptase before incorporation in the genome, as opposed to DNA-transposons, which amplify without an RNA intermediary.Thus, we can see the difference between Retrotransposons as well as the transposons.
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bioinformatics most typically analyzes what cellular macromolecules?
Although it is frequently equated with computational biology, the science of bioinformatics is similar to but distinct from biological computation. Bioinformatics most typically analyzes the nucleic acids.
In especially when the data sets are huge and complicated, the interdisciplinary area of bioinformatics creates techniques and software tools for analyzing biological data. Bioinformatics is an interdisciplinary branch of research that analyzes and interprets biological data by combining biology, chemistry, physics, computer science, information engineering, mathematics, and statistics. Using computational and statistical methods, bioinformatics has been employed for in silico studies of biological questions.
The area of bioinformatics comprises biological research that incorporate computer programming into their technique as well as specialized analysis "pipelines," particularly in the realm of genomics.
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Da toda d Lüderitz are the same distance from the equator, and both cities are near the ocean. The air temperature in Lüderitz is colder than the air temperature in Santos What causes the air in these places to be different? Explain what causes the difference as completely as you can
The ocean current phenomena is to blame for this difference in air temperature between two locations.
How would you define air temperature?The temperature of the air that surrounds organisms, including people, can be referred to as air temperature. The ocean's temperature rises as a result of the ocean water absorbing solar heat. Via ocean circulation, this heat is then absorbed, raising the air's temperature as well as that of the atmosphere.
The water in this area receives less low-intensity sunshine, which results in less heat being absorbed by the ocean and causes the air in Luderitz to be a little bit colder than that of Santos seas.
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Which taxon includes only organisms that can successfully interbreed?
Species, in biology, classification comprising related organisms that share common characteristics and are capable of interbreeding.
The genetic species idea, like the biological species concept, takes into account whether individuals are capable of interbreeding as well as the degree of genetic diversity across populations of that species, but it may also be used to determine when the species started.
Subspecies are groupings in the early stages of speciation; individuals from different subspecies occasionally interbreed, but they generate a large number of sterile male offspring. Individuals in the second stage are known as incipient species or semispecies; individuals in these groups seldom interbreed, and all male progeny are infertile.
Natural selection divides incipient species into sister species, which do not mate but are essentially identical in morphology, or structure and shape. Sibling species eventually diverge into morphologically (and taxonomically) distinct species.
Because it is sometimes difficult to discern between subspecies and stable species, additional criteria using a historical, or phylogenetic, dimension has been devised. A species is distinguished from another in this form when there is a parental pattern of ancestry and descent.
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a nasa orbiter recently captured craters and formations on mars that resembled the face of which animal?
A hill with a V-shaped collapse structure, two craters and a circular fracture pattern — possibly the remains of a buried impact crater — appear to form the face of a bear on the Mars surface.
Although bears aren't normally supposed to exist on Mars, a peculiar rock formation that was recently discovered there would lead you to believe that they do. A strange rock structure on Mars that perfectly mimics a bear's face was photographed by the NASA Mars Reconnaissance Orbiter on December 12.
The bear face is far larger than a typical bear's face, measuring around 6,560 feet across in a scaled-down rendition of the image, despite the fact that they may appear similar. A video describing the characteristics of the bear face was also released by the HiRise team. The HiRISE team described the object as having a "hill with a V-shaped collapsed structure (the nose), two craters (the eyes), and a circular fracture pattern (the head)". The settling of a deposit over a submerged impact crater could be the cause of the circular fracture pattern.
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which term defines a genotype composed of two identical alleles?
A genotype composed of two identical alleles is defined as homozygous.
A homozygous genotype occurs when an individual inherits the same allele from both parents for a specific trait. For example, if an individual inherits the dominant allele for brown eyes from both parents, they will have a homozygous dominant genotype for eye color. Similarly, if an individual inherits the recessive allele for blue eyes from both parents, they will have a homozygous recessive genotype for eye color.
In contrast, a heterozygous genotype occurs when an individual inherits different alleles from each parent for a specific trait. For example, if an individual inherits the dominant allele for brown eyes from one parent and the recessive allele for blue eyes from the other parent, they will have a heterozygous genotype for eye color.
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Complete each sentence by dragging the labels to the appropriate blanks. Then place each sentence in a logical order beginning with cardiomyocytes in a resting state correct order fast calcium correctoret blocks below into their. With_____ permeability to extracellular calcium, the postive charge enter the cell continues to enter the cell, which prolongs the duration of depolarization
With increased permeability to extracellular calcium, the postive charge enter the cell continues to enter the cell, which prolongs the duration of depolarization
How does calcium behave during depolarization?
Depolarization activates voltage-gated L-type calcium channels, causing calcium to flow into the cytoplasm from the T-tubule system.
The gated sodium ion channels on the neuron's membrane quickly open during the depolarization phase, allowing sodium ions (Na+) from outside the membrane to flood into the cell. The intrinsic charge of the neuron changes from -70 mV to -55 mV when sodium ions rapidly enter the cell.
Membrane repolarization occurs as a result of both quick sodium channel inactivation and a massive outflow of potassium ions caused by activated potassium channels.
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each of the three cell layers became different parts of the adult organism. what does that mean about the cells that were once identical?
The cells that were once identical have undergone differentiation, giving rise to distinct cell types in different cell layers.
The way that every one of the three cell layers became various pieces of the grown-up creature proposes that the cells that were once indistinguishable have gone through separation, a cycle by which cells with indistinguishable hereditary material form into various cell types with unmistakable primary and utilitarian qualities. During the beginning phases of early stage improvement, cells go through a course of specialization and separation, which includes changes in quality articulation and the reception of explicit morphological and utilitarian highlights. These separated cells then, at that point, bring about the various tissues, organs, and designs of the grown-up living being. This course of separation is essential for the appropriate turn of events and working of the creature.
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what comb types will appear in the and in the and in what proportions if single-combed birds are crossed with birds of a true-breeding walnut strain?
According to the rule of dominance, the f1 gene will exhibit dominant alleles R and P and genotype RrPp, resulting in 100% walnut comb progenies. When RrPp is self crossed, alleles separate in the 9:3:3:1 ratio.
In its broadest sense, the term "genotype" refers to the genetic makeup of an organism. In other words, it represents the complete set of an organism's genes. More narrowly, the term can be used to refer to alleles or variants of genes carried by an organism.
Each pair of alleles represents a genotype of a particular gene. A genotype is said to be homozygous if it has two identical alleles at a particular locus, and heterozygous if the two alleles are different. Alleles contribute to an organism's phenotype, the appearance of the organism.
According to Mendel's law of dominance, in heterozygotes one trait masks the presence of another for the same trait. Only the dominant allele is expressed instead of both alleles contributing to the phenotype.
The F1 generation is genotypically heterozygous as it carries both dominant and recessive alleles. Co-dominance occurs when both alleles are dominant, as in the AB blood group in humans.
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Complete question :
In the fowl, genotype rrpp gives single comb, R-P- walnut comb, rrP- pea comb, and R-pp rose comb. What comb types will appear, and in what proportions, in the F1 and F2 if single-combed birds are crossed with birds of a true-breeding walnut-combed strain?
Three solutions of pH 4.00, pH 7.00 and pH 10.00 are used to calibrate a pH meter. These solutions are known as ______a. specimens b. standards c. controls d. aliquots
Three solutions of pH 4.00, pH 7.00 and pH 10.00 are used to calibrate a pH meter. These solutions are known as standards. So, option B is correct.
Solutions with a standard pH are known as standard buffer solutions. In order to perform numerous pharmacopoeia tests that call for pH modifications or maintenance, they are utilized as references in pH measurements. You will need pH7 and pH4 buffer solutions to calibrate a pH meter. When using a pH meter, you want to make sure that it displays the correct measurement, thus these buffer solutions assist you in doing that. Regular calibration is required because both of these might alter over time. When the electrode is submerged in pH 7 buffer, the zero point, often referred to as the asymmetric potential or point, is normally the mV value. Unsurprisingly, 0 mV is the theoretical zero point.
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Which metabolic pathway is common to both fermentation, a type of anaerobic respiration, and aerobic respiration?
a. Glycolysis
b. Krebs cycle
c. Electron transport chain
d. Acetyl Co-A formed from pyruvate
e. chemiosmosis
The correct option is A; Glycolysis , Glycolysis is a Metabolic Pathway seen in both cellular respiration and fermentation.
Glycolysis is the first step of respiration. Glycolysis is common to both aerobic and anaerobic respiration since glucose is the primary source of energy and the glycolysis process is oxygen-independent. As a result, the presence or absence of oxygen has no effect on this mechanism, which is common to both aerobic and anaerobic respiration.
Glycolysis is a metabolic route that is shared by glucose fermentation and cellular respiration. Fermentation includes glycolysis as well as processes that replenish NAD+ by transferring electrons from NADH to pyruvate or pyruvate derivatives.
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describe the role of checkpoints in the onset of cancer
Answer:
Explanation:
Checkpoints play an important role in the onset of cancer. They are regulatory mechanisms within cells that help ensure proper progression through the cell cycle and prevent the formation of cancerous cells. The checkpoints are responsible for monitoring cell growth and division and ensuring that DNA damage is repaired before the cell continues to divide. If these checkpoints fail, the cell can continue to divide with mutations and other genetic abnormalities that can eventually lead to cancer.
There are two main checkpoints in the cell cycle: the G1 checkpoint and the G2 checkpoint. The G1 checkpoint determines if a cell is ready to enter the next phase of the cell cycle, while the G2 checkpoint monitors DNA damage and checks for errors before the cell can undergo mitosis. If either checkpoint fails, the cell may proceed with division despite having genetic mutations that can increase the risk of cancer.
In addition to these checkpoints, there is also a third checkpoint, the M checkpoint, which monitors the progress of chromosomes during cell division to ensure that each daughter cell receives an accurate copy of the chromosomes. If the M checkpoint fails, it can result in the formation of aneuploid cells, which are cells with an abnormal number of chromosomes. Aneuploidy is a hallmark of cancer and is associated with a high risk of developing malignant tumors.
In conclusion, the role of checkpoints in the onset of cancer is critical as they help prevent the formation of cancerous cells by monitoring cell growth, division, and DNA damage. The failure of checkpoints can lead to the formation of mutated cells that are more likely to develop into cancer.
A doctor is exploring some tissue with a blunt probe. She notices that the tissue is white and fatty and seems to be concentrated within the spinal cord. She is observing
A doctor is exploring some tissues with a blunt probe. She notices that the tissue is white and fatty and seems to be concentrated within the spinal cord. she is observing gray matter.
What is myelin sheath?Myelin sheath is a layer made of fats and proteins that surrounds the spinal cord and nerves. It not only provides them with insulation and protection but also increases the speed of signal transmission across nerves.
This sheath is present around the cell body of each nerve cell for maximum protection and efficient signal transmission. Myelin sheath also helps to maintain the strength of the signal transmitted across the nerve cells.
Therefore, A doctor is exploring some tissues with a blunt probe. She notices that the tissue is white and fatty and seems to be concentrated within the spinal cord. she is observing gray matter.
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which of the terms below describe a post zygotic barrier to gene flow in which the offspring can be fertile, but the second generation is feeble or sterile?
Option B is correct. Hybrid breakdown; A form of reproductive failure known as hybrid breakdown appears just after F2 generation of passes between various species or subspecies.
A few first hybrids are feasible and fertile, but then when they find a partner with each other or with either of their parent species, the offspring of the following generation are weak or sterile. This phenomenon is known as the postzygotic barrier.
One example of a post-mating isolation mechanism, which is a subtype of reproductive isolation, is hybrid breakdown. The first generation (F1) of hybrids are viable as well as fertile, but subsequent generations (F2 and backcrosses) of hybrids could be inviable or sterile. Hybrid breakdown doesn't really boost a species' biotic potential.
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Complete Question-
Which of the terms below describe a post zygotic barrier to gene flow in which the offspring can be fertile, but the second generation is feeble or sterile?
a. Reduced hybrid viability
b. Hybrid breakdown
c. Reduced hybrid fertility
d. Gametic isolation
based on its ability to use gasoline as an energy source, a particular strain of bacteria could be described as
If a particular strain of bacteria was capable of utilizing gasoline as a source of energy, it might be categorized as a chemoorganotroph.
Chemoorganotrophs are organisms that utilize the electrons in organic materials as fuel and chemical molecules as a source of energy. Hence, the organic component is their source of reducing equivalents. Simply, chemoorganotrophs get their electrons from organic substances. As a result, organic molecules meet their entire energy and carbon needs. They primarily use the chemical bonds in lipids, proteins, and organic substances like sugars as a source of energy (like glucose). Chemoorganotrophs include certain predatory, parasitic, and saprophytic prokaryotes as well as a few heterotrophic protists and mammals. Several archaea also perform chemoorganotrophic functions. Fungi are chemoorganotrophs, which means they use organic carbon as an electron giver and a source of carbon. Chemotrophs, which derive their energy from the oxidation of electron donors in their surroundings, include both chemoorganotrophs and chemolithotrophs.
The complete question is:
Based on its ability to use gasoline as an energy source, a particular strain of bacteria could be described as ______________.
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Can I have help please
Answer:
Tar - picture N 4
Nicotine - picture N 1
Carbon monoxide - picture N 3
Smoke particles - picture N 2
briefly describe what each brain region controls. cortex: cerebellum: hypothalamus: corpus callosum: medulla: pons:
cortex
The outer layer protecting the outside of your brain is called the cerebral cortex. There are approximately 14 and 16 billion nerve cells in it. The higher cognitive functions of the human brain, such as memory, cognition, learning, reasoning, problem-solving, emotions, consciousness, and sensory functioning, are all governed by the cortex.
cerebellum
A component of your brain called the cerebellum aids in the coordination and regulation of a wide range of bodily and mental processes. More than half of the neurons—the cells that make up your nervous system—in your entire body are contained in it, despite the fact that it is very small in comparison to your brain overall.
hypothalamus
Your peripheral nervous system, which also responds to signals outside of your body, and the nerve cells in your brain and body (your hypothalamus) send chemical messages to each other. Reacting to these signals is your hypothalamus's principal job in maintaining the stability or internal balance of your body.
corpus callosum
The corpus callosum, a substantial bundle of nerve fibers in the brain that connects the two hemispheres, allows communication and signal transmission between the two sides of the brain. This cerebral highway serves as a continuous conduit for the exchange of information that combines sensory, motor, and cognitive components.
medulla
The lowest portion of your brain is called the medulla oblongata. Because of its location, where your brain and spinal cord converge, it serves as a crucial pathway for nerve messages traveling to and from your body. Additionally, it aids in maintaining the regulation of critical functions like blood pressure, respiration, and heartbeat.
pons
The brainstem, which connects the spinal cord to the brain, includes the pons. Your sleep-wake cycle and breathing are only two examples of the tasks and unconscious processes it manages. It also has a number of sites where nerves that control muscles and transmit information from your senses to your head and face converge.
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47
In cows, the allele for fur color is controlled by codominant alleles. A cow that is homozygous black (FF) is
crossed with a cow that is homozygous white (WW). The offspring produced will be
F
F
W
W
FW
FW
A Gray all over
C Completely black
FW
FW
B Black and white spotted
D Gray and white
Codominant alleles in cows regulate the fur colour allele, meaning that when both the black and white alleles are present in a single person, both alleles express themselves equally.
What are alleles?Alleles are different versions of a gene that exist at a certain locus (position) on a chromosome in genetics. They are in charge of a population's genetic variety and determine several variations of a particular feature, such as eye colour or blood type. Each gene has two alleles, one from each parent, which are present in every person. The individual is homozygous for that gene if both alleles are the same; otherwise, the individual is heterozygous. The dominant allele in a dominant-recessive relationship is expressed in an individual's phenotype, but the recessive allele is only expressed when two copies are present (homozygous recessive).
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when phospholipids are placed in water they spontaneously from a bilayer with which of the following
- the polar heads on the surface and the non polar tails in the interior
- the polar heads on the surface and the non polar tails in the exterior
When phospholipids are placed in water they spontaneously form a bilayer with the polar heads on the surface and the nonpolar tails in the interior because fatty acid tails are poorly soluble in water therefore phospholipids at that moment form bilayers in aqueous solutions, Then the hydrophobic tails buried in the interior of the membrane and the polar head groups exposed on both sides.
The arrangement of this lipid bi layer consists of head containing phosphate group, which has a polar character or negative charge, and an area called the tail (the fatty acids), which is neutral. Therefore the head can form hydrogen bonds, but the tail cannot. Therefore the head remains outside forming hydrogen bonds with the water molecules that's why they are called hydrophilic.
On the other hand the tail remains in the interior that's why they are hydrophobic.
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explain the difference between a mutation in a somatic cell vs a mutation in a gamete
Somatic mutations—which take place in a single bodily cell and are not inherited—are (only tissues derived from mutated cell are affected) Germline mutations can be passed on to progeny since they arise in gametes.
Difference Gametes, often known as sperm and eggs, are our sex cells or somatic cells, which are our body cells. A diploid genome is found in somatic cells. As a result, they inherit two copies of each chromosome, one from each parent. On the other hand, haploid genomes are produced by a process known as meiosis that results in the formation of gametes.An organism's offspring may inherit a mutation if it arises in a germ-line cell (a cell that will develop into gametes, such as egg or sperm cells). Therefore, each and every cell in the growing embryo.For more information on mutation kindly visit to
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when a person cries, tears are exported from cells. which category of transport most precisely matches this process?
The process of exporting tears from cells involves an active transport mechanism known as exocytosis.
What is exocytosis?Cells transfer chemicals, such as hormones or proteins, to the exterior of the cell through a process called exocytosis.
When tears are produced, the cells in the lacrimal glands that do so release the fluid by a process called exocytosis, which enables it to leave the cell and enter the tear ducts.
A vesicle or membrane-bound organelle carrying the material to be released fuses with the cell membrane during exocytosis, enabling the release of the contents of the vesicle outside the cell.
Thus, exocytosis is the type of transport that best describes the method by which cells export their tears.
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which of the following is a function of telomerase? to protect dna polymerase. to help make okazaki fragments. to proofread during dna replication. to prevent cancer. to overcome telomere shortening.
It stops the shortening of telomeres. Telomerase is crucial for maintaining telomere length since decreased telomerase activity results in shorter telomeres and ageing cells.
The ribonucleo-protein telomerase, also known as terminal transferase, extends the 3' end of telomeres by introducing a species dependent on the telomere repeat sequence. Most eukaryotes which have telomeres, which are segments of repeating sequences, at each end of their to the chromosomes. Telomeres shield that the chromosomal end from DNA-deterioration or fusion with nearby chromosomes. Also, because it lacks the telomerase, the fruit fly which is Drosophila melanogaster depends on retrotransposons to preserve the telomeres.
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QuestionInterphase is also called resting stage becauseACell has stopped divisionBCell is metabolically inactiveCNo visible changes occur in the nucleusDCell does not growEasy
Interphase is also called the resting stage because the cell has stopped division. So, option A. is the correct answer.
Interphase is the phase of the cell cycle in which an ordinary cell devours most of its life. During this stage, the cell replicates its DNA in preparation for mitosis. Interphase is the daily tenancy or metabolic stage of the cell, in which the cell obtains nutrients and metabolizes them, thrives, reads its DNA, and conducts additional typical cell processes. The prevalence of eukaryotic cells spends most of their period in interphase. This phase was previously named the resting phase. Nevertheless, interphase does not characterize a cell that is simply resting; rather, the cell is living and organizing for later cell division, so the word was altered.
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