Proline and glycine are the least likely to occur in the middle of an alpha-helical protein structure.
The amino acid chain will eventually form a rod as a result of the tightly packed structure of an alpha helix.
An alpha helix is highly likely to be formed by methionine, alanine, leucine, glutamate, and lysine. It is highly unlikely that proline and glycine will join together to form an alpha helix. Since prolines have a very long side chain, it is thought that prolines prevent alpha-helix formation. Glycine, on the other hand, is small and pliable, so it doesn't usually bind together in an alpha helix.
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why was shifting cultivation sustainable in the past
a fruit fly with short artistae (aa) and dumpy wings (dd) us crossed with a fruit fly that is cis-heterozygous for both traits. with crossing over, what percentage of the offspring are expected to have the wild type phenotype?
50% will be Long winged, Long Aristae / 50% will be dumpy winged, long aristae in Fruit fly.
Due to the fact that they only have four pairs of chromosomes (2n = 8), fruit flies are simple to research. The largest larva, the third instar larva, contains enormous "polytene" chromosomes that are simple to stain and study. There are four homologous pairs of chromosomes in Drosophila melanogaster, including two pairs of big autosomes, one of which is somewhat smaller than the other pair, one pair of extremely small autosomes, and a pair of sex chromosomes. They have 2 sets of autosomes and 1 or 2X chromosomes. The fly is male if a diploid cell (1X:2A) contains just one X chromosome. A diploid cell with two X chromosomes (2X:2A) indicates that the fly is female.
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HELP ME PLSSSSS!!!
What are two differences between phototropism and gravitropism in plants?
Answer: The stimulus: Phototropism is the growth of a plant in response to light, whereas gravitropism is the growth of a plant in response to gravity.
The direction of growth: Phototropism causes a plant to grow towards a light source, while gravitropism causes a plant to orient its growth in response to the direction of gravity, typically roots grow downward while shoot grow upwards.
Identify the structures of the kidney. Part A Drag the labels onto the diagram to identify the structures. Reset Help renal papilla renal pelvis renal vein ureter renal pyramids renal column Dodo minor calyx renal artery
The labels diagram to identify the structures of the kidney:
1. Renal column
2. Minor calyx
3. Renal artery
4. Renal vein
5. Renal papilla
6. Ureter
7. Renal pyramid
8. Renal column
The kidneys аre а pаir of beаn-shаped orgаns thаt аre found high in the bаck of the аbdominаl cаvity, just below the rib cаge; one on either side of the spine. The right kidney is slightly lower thаn the left becаuse of the position of the liver.
A kidney is divided into а dаrk outer аreа (the cortex) аnd аn inner lighter-coloured аreа (the medullа). Within the medullа there аre between 10 аnd 18 renаl pyrаmids; triаngulаr structures which hаve а striped аppeаrаnce. They hаve this аppeаrаnce becаuse of the renаl tubules аnd аssociаted blood vessels. The renаl cortex аnd the pyrаmids mаke up the renаl pаrenchymа. It is here thаt аpproximаtely one million nephrons аre the working centres of the kidneys.
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explain how the calcium transient differs between cardiac and skeletal muscle and how this influences contractility
The calcium transient is a process that occurs in both cardiac and skeletal muscle, but it differs in some key ways.
In cardiac muscle, the calcium transient is triggered by the release of calcium ions from the sarcoplasmic reticulum (SR), which is a specialized organelle that stores calcium ions. This release of calcium ions causes a brief increase in the concentration of calcium ions in the cytoplasm, which in turn triggers muscle contraction.In skeletal muscle, the calcium transient is triggered by the release of calcium ions from the SR, but it is also dependent on the release of calcium ions from the extracellular space. The release of calcium ions from the SR is triggered by the action potential that travels along the muscle fiber, while the release of calcium ions from the extracellular space is triggered by the binding of the neurotransmitter acetylcholine to the muscle cell membrane.What are the difference in both?The difference in the calcium transient between cardiac and skeletal muscle influences contractility, or the ability of the muscle to contract.
Cardiac muscle contractility is largely dependent on the amount of calcium ions released from the SR, while skeletal muscle contractility is dependent on both the amount of calcium ions released from the SR and the amount of calcium ions released from the extracellular space.
Additionally, cardiac muscle has a slower rate of relaxation, which allows for a more sustained contraction. Skeletal muscle has a faster rate of relaxation, which allows for a more rapid contraction and relaxation cycle.
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Which of the following would not characterize allopathic selection?
Answer:
yes
Explanation:
Which of the following statements best describes the electrical events recorded by an electrocardiogram (ECG)? the sum of the electrical activity of the contractile cells only the sum of the electrical activity of all cells in the heart the sum of the electrical activity of all the cells of the body the sum of the electrical activity of the autorhythmic cells only
The best description about electrical events recorded by an electrocardiogram (ECG) is: the sum of the electrical activity of all cells in the heart.
ECG is the medical test that records the activities and functioning of the heart by meaning of electrical signals. The electrocardiogram generates a graphical representation of the heart beats. The irregular contractions of the heart can be detected by means of electrocardiogram.
Heart is the most important organ of the circulatory system that circulates blood to all the organs and cells of the body. The heart is a small-fist sized organ present between the two lungs and shifter slightly towards the heart.
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if a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be present in a somatic cell?
If a cell at metaphase of mitosis which contains 20 sister chromatids, Then, there will be 10 pairs of chromosomes will present in a somatic cell.
The normal number of chromosomes in a cell is 10 and there are usually 5 pairs of chromosomes. Since there are now 20 chromatids, duplication has occurred and they should become two identical pairs (sister chromatids). Therefore, there are 10 centromeres. If there are 20 centromeres in anaphase, there are 20 chromosomes in the dividing cell. As a result, each terminal pole of a dividing cell acquires 10 chromatids and each chromatid becomes a chromosome of the cell at the metaphase. After division, each chromosome consists of only one chromatid, a total of 23 chromatids. When a fertilized egg is formed during sperm-egg fusion, the final cell is diploid and contains 46 chromosomes (23 from each gamete).
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Which of the following' is NOT a characteristic of good test data?A. should be comprehensiveB. users do not participate at this preliminary stageC. every statement should be executedD. expected output from the module's execution should be determined manuallyE. None of the above
Users do not participate at this preliminary stage this is NOT a characteristic of good test data.
What is meant by preliminary?
Prelim (short for preliminary examination) is typically used to refer to a test that determines if a student is eligible to continue their education at a higher level and/or to assess their understanding of their course material and readiness for a forthcoming exam.It can also serve as a benchmark for one's level of expertise in the field.At some institutions, preliminary exams may come before the qualifying exam, however some universities combine both ideas into a single exam.The preparatory exams needed before a graduate student is allowed to start working on a doctoral dissertation are known as "Prelims" in many American educational institutions.To learn more about preliminary refer to
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The approximate time required for the moon to move from position 3 to position 7 is -
1 hour
1 hour
2 weeks
2 weeks
3 months
3 months
4 days
The correct answer is option B.
The approximate time required for the moon to move from position 3 to position 7 is 2 weeks.
Moon is the natural satellite of the earth and it takes one month to complete one revolution on its orbit around the earth.
Approximately moon takes 27.3days to complete one revolution however when it changes from new moon to new moon then it takes 29 days.
Simply put, in the given picture we can see that moon is moving from position 3 to 7 which means it completes half circle around the earth. As it takes 4 weeks or full month to complete one circle around earth therefore, it will take 2 weeks to complete half orbit.
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which sequence of events correctly represents the circulation of mature t cells and b cells through the lymphatic and circulatory systems
B cell and T cells go back and forth between the blood and lymph constantly. They do not cease moving, proliferate, or develop into effector cells or memory cells until they come into contact with their particular foreign antigen in a peripheral lymphoid organ.
The thymus and bone marrow are the two main immune system components. All of the body's blood cells, including T cell and B lymphocytes, originate in the bone marrow, making it a vital component of the immune system. T cells move to the thymus, while B lymphocytes continue to develop in the bone marrow.
The specialised milieu of the bone marrow is where B cells are produced and developed, whereas the thymus offers a specialised and architecturally ordered microenvironment for the development of T lymphocytes.
The cortex and paracortex of the lymph node are made up of T and B lymphocytes, the medulla is made up of plasma cells and macrophages, and the sinuses that allow lymph to move through it make up the lymph node. Unactivated lymphocytes pass through high endothelial venules in the cortex to lymph nodes from the circulation.
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who demonstrated that dna is the genetic material of the t2 phage?
Hershey-Chase demonstrated that DNA is the genetic material of the t2 phage.
The Hershey-Pursue tests were a progression of examinations led in 1952 by Alfred Hershey and Martha Pursue that assisted with affirming that DNA is genetic material.
While DNA had been known to researcher since 1869,numerous researchers actually accepted at the time that proteins conveyed the data for legacy since DNA seemed, by all accounts, to be a dormant particle, and, since it is situated in the core, its job was viewed as phosphorus stockpiling. In their examinations, Hershey and Pursue showed that when bacteriophages, which are made out of DNA and protein, contaminate microorganisms, their DNA enters the host bacterial cell, however the greater part of their protein doesn't. Hershey and Pursue and resulting revelations generally demonstrated that DNA is the innate material.
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I will give brainly to whoever answers this correctly! Very urgent!!!!
Biodiversity- B
Organism-G
Cell- I
Adaption-B
Answer:
B
G
I
B
Explanation:
I took this the other week
jim is lifting weights. holding a 20lb weight down by his side, he bends his arm at the elbow, contracting his bicep, and holds the position until he reaches muscle fatigue. according to the henneman size principle in what order will his muscle fibers be recruited?
According to Henneman's size principle, Jim's muscle (when He lifting weights, holding a 20lb weight down by his side, he bends his arm at the elbow, contracting his bicep, and holds the position until he reaches muscle fatigue) recruited in order of size when under load. This means that slower, lower force, more fatigue-resistant muscle fibers are recruited before faster, higher force, less fatigue-resistant muscle fibers.
The foundation for size-ordered activation or recruitment of motor units during movement is Henneman's size principle, which links the input and output characteristics of motoneurons and their muscle fibers to size. Regardless of whether the muscles are self- or cross-reinnervated by the regenerated axons, after nerve injury and surgical repair, the link between motoneuron size and the number and size of the muscle fibers that the motoneuron reinnervates is initially lost but returns over time.
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The interaction between bees and sunflowers is an example ofanswer choicespredationherbivoryparasitismmutualism
Answer:
example of mutualism
Explanation:
The interaction between bees and sunflowers is an example of mutualism. b/c mutualism is a type of ecological connection where both species gain from the interaction. In the case of sunflowers and bees, the flowers profit from the pollination services supplied by the bees, while the bees gain from the nectar provided by the blooms.
which trait distinguishes between the kingdoms of bacteria and archaea?whether or not the organisms thrive in extreme conditionswhether or not the organisms thrive have a nucleuswhether or not the organisms are unicellular or multicellularwhether or not the organisms have a cell wall
The trait that distinguishes between the kingdoms of bacteria and archaea is whether or not the organisms have a cell wall.
Bacteria have a cell wall composed of peptidoglycan, while archaea lack this component in their cell wall. Instead, they have a different type of cell membrane, such as ether-linked phospholipids. This structural difference in the cell wall is the main criterion that is used to differentiate between bacteria and archaea, although there are other differences, such as genetic and metabolic differences. Additionally, bacteria and archaea can thrive in different types of environments, for example, bacteria can thrive in a wide range of environments including extreme conditions, while archaea can thrive in extreme conditions such as high salinity, high temperature, and high pressure.
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Which of the following pollutants are responsible for the cause of SMOG?
(a) From incinerators
(b) Emissions from vehicles
(c) Both incinerators and emissions from vehicles
(d) None of the above
Both incinerators and emissions from vehicles are responsible for the cause of SMOG. Other sources such as burning of fossil fuels, industrial processes, and natural sources can also contribute to the formation of SMOG.So the correct option is c.
SMOG is an abbreviation for ‘smoke and fog’, and refers to a type of air pollution caused by chemical reactions that occur when certain pollutants are released into the atmosphere. The main contributors to SMOG are emissions from vehicles and incinerators.
Vehicles are a major source of SMOG pollution because they release harmful gases and chemicals into the air. The most common pollutants emitted from vehicles are carbon monoxide, nitrogen oxides, and particulate matter. These pollutants are released into the atmosphere and react with sunlight, moisture, and other chemicals in the air to form smog.
Incinerators are also a significant source of SMOG. They are used to burn and dispose of waste, but in the process, they release pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter into the air. These pollutants react with sunlight, moisture, and other chemicals in the air to create smog.
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Which of the following is not a method used by taxonomists today to classify organisms?
Select one:
a.
Comparative anatomy & physiology
b.
Cell biology
c.
Comparative embryology
d.
Fossil record
Taxonomists are able to classify the organisms based on Comparative anatomy & physiology. Option A
What is taxonomy?When we talk about taxonomy, we have to think about the system that would allow us to be able to classify all the living organisms that we have in the universe. We know that the living things that we have fall into many different classes.
The question now would be, how exactly do we go about the classification of the organisms? If we are to do that we have to be able to devise a system that can be used and applied across the bboard and this is the idea of the use of taxonomy and it is based on the anatomy of the organism that we have to study.
The comparative anatomy of the organisms would tell us that they can be put into a category that is similar and thus they can be classed together in each case.
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What are the two types of species interactions?
Interactions that take place between members of the same species are referred to as inter-specific interactions, whereas intra-specific interactions happen between members of different species.
Inter-specific or intra-specific interactions in the environment can be distinguished. Interactions between members of the same species are known as intra-specific interactions, whilst those that take place between members of two or more species are known as inter-specific interactions. These relationships, however, can be influenced and modified by other species and their interactions because the majority of species live in ecological communities. These include rivalry, predation, herbivory, and symbiosis, which will all be covered in this article. Competition is most frequently thought of as the interaction of individuals who compete for a scarce shared resource, but it may also be defined more broadly as the direct or indirect contact of organisms that results in a change in fitness when the organisms share a resource.
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Causes of treatable dementia include all of the following EXCEPTO vitamin B-12 deficiencyO alcoholism. O depression. O Alzheimer's disease.
Treatable dementia is caused by a vitamin B-12 deficiency. Dementia is a word used to describe the decreased capacity to remembering, think, conduct make decisions rather than a specific disease.
Describe dementia.Dementia is a word used to describe the poor memory, thinking, or decision-making that interferes with performing daily tasks rather than a specific disease. As far as dementia goes, Vascular dementia the most prevalent. Despite the fact that dementia primarily affects older persons, it is not a natural aspect of aging.
Why does dementia develop?Alteration to this or loss of the brain's nerve cells as well as connections is what leads to dementia. Dementia can have varied effects on different people and produce distinct symptoms depending on the region of the brain which is affected.
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All of these are risks of renewable energy except
A. can disrupt migration patterns of birds
B. can cause flooding
C. can contaminate groundwater
D. can spill during transport and disrupt ecosystems
Answer:
D. can spill during transport and disrupt ecosystems
Explanation:
The correct option would be "D. can spill during transport and disrupt ecosystems" as it is not a risk of renewable energy sources, as renewable energy sources such as solar, wind, and hydroelectric power do not involve transport of fuels and do not have the risk of spills.
What do we call specific sequences of genetic material that code for a trait?
answer choices
Phenotype
Genotype
Nuclei
Mitochondria
specific sequences of genetic material that code for a trait is called as Genotype. it can also be called as alleles or variant forms of gene.
For dominant and recessive alleles, respectively, in discussions of genotype, biologists employ capital letters. For example, "B" denotes a blue allele and "b" denotes a brown allele in terms of eye color. A homozygous dominant genotype describes an organism that possesses two dominant alleles for a certain trait. In the case of the eye color, this genotype is denoted by the letter BB. It is referred to as having a heterozygous genotype when an organism possesses both a dominant and a recessive allele. This genotype is denoted by the letters Bb in our example. Last but not least, homozygous recessive refers to a genotype in which an organism possesses two recessive alleles. This genotype is denoted as bb in the example with the eye color.
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Question 6
Green peas are dominant to yellow peas. A yellow pea plant crosses with a green pea plant and 100% of the offspring
are green. What must be the genotypes of the parents?
A. Gg x Gg
B. GG x gg
C. gg x gg
D. Gg x gg
50% of the offspring will have a Gg phenotype and 50% will have gg phenotype.
What are genotypes?The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolise it. For illustration, BB, Bb, and bb could be used to denote a certain gene variant. The universally compatible genotype, genotype AA, ensures that no matter who they mate with, they will never give birth to a child who has sickle cell disease. The compatible and incompatible genotypes are listed below: AA and AA are complementary. AA and AS are complementary. AA and SS go together.The genotypes that could result from the cross are green and yellow.Gg and gg phenotypes will each make up half of the offspring.To learn more about genotypes refer to:
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The table above shows the nutritional information in a bottle of pop. Drinking 16 oz of this beverage would provide which of the following?
30% of the total carbohydrates for a person on a 2,000 calorie diet will provide if drinking 16 oz of this beverage.
What are carbohydrates?
Carbohydrates are macronutrients that provide energy to our bodies in three ways. Carbohydrates are vital at every stage of life. They're the body's primary source of energy and the brain preferred energy source.
Carbohydrate-containing foods are converted into glucose or blood sugar by the digestive system during the digestion process.
Therefore Carbohydrates are broken down by the body into glucose – a type of sugar. Glucose is used as fuel by your body's cells, tissues, and organs.
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Fungi are multicellular decomposers that obtain nutrients by a. internal digestion b. extracellular digestion c. photosynthesis d. chemosynthesis
The correct option is b, that is extracellular digestion. Fungi are multicellular decomposers that obtain nutrients by extracellular digestion.
What are fungi ?Along with plants, mammals, protozoa, and monera, fungi make up the kingdom Fungi. Fungi are a form of eukaryotic life. The variety of fungi is astounding, and some of the most typical types include yeast, molds, truffles, and mushrooms.
Any member of the eukaryotic group of organisms, which also includes the more well-known mushrooms and microbes like yeast and mold, is referred to as a fungus.
How do fungi cause harm?Food spoilage, forest destruction, crop, livestock, and human disease are just a few of the negative effects caused by fungi. Many foods that are stored become spoiled by fungi, particularly molds like Penicillium and Aspergillus. The bulk of plant diseases are brought on by fungi, which in turn results in significant monetary losses.
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How does producing an overabundance of offspring help sea turtles overcome the many dangers that their offspring encounter and ensure that their species population numbers stay relatively steady?
Answer: Sea turtles produce many offspring so that if some die, there will still be some that live and carry on the species.
Explanation:
Sea turtles can be killed by birds, poachers, people (Most likely on accident), or just any other unforeseen circumstances when trekking from their eggs to the sea when they hatch. Sea turtles produce many offspring so if a few do die, there will still be (hopefully) a sufficient amount to carry on the species.
Hope this helped!
By producing an overabundance of offspring, the sea turtles increase their chances of survival.
What are sea turtles?Large, air-breathing reptiles that live worldwide in tropical and subtropical oceans are known as sea turtles. They lay numerous eggs in each nesting season. This strategy of producing many offspring is known as “bet-hedging.”
They produce an overabundance of offspring to help ensure that some will survive despite the dangers face by them. This strategy also helps to maintain the population numbers of sea turtles over time, as the survival of some offspring will help to replace those lost to predation or other factors.
Additionally, by laying their eggs on multiple beaches in different regions, sea turtles increase their chances of survival by diversifying their genetic makeup and reducing the risk of a single catastrophic event wiping out the entire population.
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Good morning^^ 30 pts! Can someone please help me with my question? thank youuu
Think of ways in which scientists are presently challenging our ideas about the Universe?
Answer: How fast the universe is growing
Explanation: Scientists believe that our universe is constantly growing, but no scientists nor astronomers agree how fast
There are several ways in which scientists are currently challenging our ideas about the Universe:
Dark Matter and Dark Energy: Scientists have observed that the Universe contains much more matter than what can be accounted for by the visible matter we can see. This has led to the concept of dark matter and dark energy, which make up most of the Universe but remain mysterious and unobserved. Scientists are actively searching for evidence of these mysterious components of the Universe.Inflation Theory: The Inflation theory proposes that the universe underwent a rapid expansion in the first fraction of a second after the Big Bang. It explains the uniformity of the universe and is supported by recent observations of the cosmic microwave background radiation.The Multiverse Hypothesis: The multiverse hypothesis suggests that there may be multiple universes beyond our own, each with its own set of physical laws and characteristics. Some scientists have proposed that the multiverse may explain the existence of dark matter and dark energy, the values of physical constants, and the nature of the Big Bang.Quantum Mechanics and General Relativity: The laws of quantum mechanics and general relativity are the foundation of our current understanding of the nature of space-time and the behavior of matter. However, they are incompatible and scientists are trying to find a way to unify them in a theory of quantum gravity.The nature of black holes: Scientists have recently made observations of the event horizon of black holes and they were different from what they expected, leading to new questions about the nature of black holes.
These are just a few examples of how scientists are currently challenging our ideas about the Universe. Scientific research is a continuous process and new discoveries are being made all the time, leading to new questions and new challenges to our current understanding of the Universe.
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what are the chemical components of a dna nucleotide?
DNA is composed of four nucleotide chemical components: adenine (A), thymine (T), guanine (G), and cytosine (C) .The nucleotides bind together (A with T and G with C) to form chemical connections known as base pairs, which join the two DNA strands.
DNA is Deoxyribonucleic Acid composed of monomer units called Nucleotides. Nucleotide is made up of the Nucleoside+Phosphate group. Nucleoside is composed of sugar and phosphate groups. The pentose sugar deoxyribose is present in DNA and the nitrogen base is substituted at the first carbon atom and phosphate at the fifth carbon atom.
Nitrogenous bases in DNA are Adenine, Guanine, Thymine and Cytosine. DNA is a double stranded helix formed by complementary base pairing where Adenine always pairs with Thymine and Guanine with cytosine. Two hydrogen bonds in A and T and 3 hydrogen bonds between G and C.The Backbone of DNA is made of sugar and phosphate units and due to presence of phosphate it has net Negative charge.
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What is the result of mitosis? question 14 options: two genetically identical daughter cells two genetically unique daughter cells four genetically identical daughter cells four genetically unique daughter cells
Mitosis results in the formation of two daughter cells that are genetically identical to each other and to the parental cell.
A diploid cell begins with 2N chromosomes and 2X DNA. The cell is still genetically diploid (2N chromosome number) after DNA replication, but it has 4X DNA content because each chromosome has replicated its DNA. Each chromosome is now made up of a pair of identical sister chromatids that have been joined together. Sister chromatids separate and move to opposite ends of the dividing cell during mitosis. Mitosis results in the formation of two identical cells, each with 2N chromosomes and 2X DNA content. Except for germline cells, which undergo meiosis (see below) to produce gametes, all eukaryotic cells replicate via mitosis (eggs and sperm).
Prophase - chromosomes condense; each chromosome is made up of two identical sisters.
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when standing still in front of a closed door and pushing on it without it moving, the muscle action/tension is called:
Answer:
KINESIOLOGY: TYPES OF MUSCLE CONTRACTIONS: Eccentric Contraction: The eccentric contraction plays a very important role in controlling and stopping movement and in preparing the muscles for an explosive type contraction.
