Blood pressure, breathing, heart rate, and sweating all drop as digestion increases.
The hormone acetylcholine is released by the parasympathetic nervous (PNS) to slow the heart rate. Your heart rate may briefly increase due to stress, coffee, and excitement, but it may momentarily decrease due to meditation or deep, steady breathing. Patients with hypertension exhibit decreased parasympathetic activity in contrast to sympathetic stimulation activity, indicating an imbalance between the sympathetic and parasympathetic nervous systems [39,40,41]. In diabetic individuals with impaired parasympathetic regulation, blood pressure, hypertension is more common. Construction of pupils is the result of parasympathetic nervous system stimulation. reduced blood pressure and heart rate. The sympathetic branch is stimulated, which facilitates function and raises heart rate.
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Which is true of all marine ecosystems?
Answer:
Marine ecosystems are aquatic environments with high levels of dissolved salt, such as those found in or near the ocean.
Explanation:
Hope it helps!
PLEASE HELP?!? FOR MY EATH SCIENCE
Kepler-452b is considered a Super-Earth in the middle of the habitable
zone. What challenges does this planet face in terms of being
habitable?
A- its incredible mass causes the gravity on the surface to be about
twice what we feel here on Earth
B- the thick atmosphere could trap heat creating a runaway greenhouse
effect
C- both A and B
D- none of the above
A runaway greenhouse effect could be caused by the dense atmosphere, which could trap heat.
The correct answer is B
What exactly are context and an example?The atmosphere of Earth is responsible for all of the clouds you see in sky, the wind that blows through the trees or even the flag at your school yard, and even the sunlight that you feel on your face. From the planet's surface all the way up to 10,000 kilometers (6,214 miles) above, the atmosphere of Earth is present.
What components make up the atmosphere?Multiple gases are mixed together. Approximately 78 percent nitrogen plus 21 percent oxygen make up the air in the Earth's atmosphere. Other gases including hydrogen, neon, and carbon dioxide are also present in very minute concentrations in air.
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retroviruses multiple choice produce protein directly from dna. only invade plants. contain dna. produce rna from dna. contain the enzyme reverse transcriptase.
Direct protein synthesis from DNA occurs in retroviruses. comprise DNA. from DNA, make RNA. simply plants invading. contain reverse transcriptase as an enzyme.
Why do you use the term "retrovirus"?(REH-troh-VY-rus) A category of virus whose genetic material is RNA rather than DNA. Reverse transcriptase is an enzyme that is used to integrate into the DNA of the host cells. This enables the virus to replicate often in the host cells.
What makes retroviruses unique?Because they multiply by reversibly encoding their genes into host cells, retroviruses are special. The most well-known retrovirus to infect people is HIV. Different species have been found to contract other retroviruses.
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Paul has been sick for several days and has
a fever of 102. A few days ago, he visited
the ER, where the attending physician
diagnosed him with a bacterial infection. It's
been 3 days, but Paul's body has been
unable to fight the infection.
Bloodwork has been completed and lab
results indicate that the vacuoles in Paul's
white blood cells are successfully trapping
the bacteria; however, the organelle
responsible for releasing enzymes that
break down the bacteria's cell walls is not
working properly.
Which organelle
is malfunctioning?
Diabetes, heart disease, Alzheimer's, Parkinson's, and even normal aging have all been related to dysfunctional mitochondria.
What do the makeup and purposes of mitochondria entail?Cell organelles called mitochondria, which are membrane-bound, generate the majority of a chemical energy needed to power a cell's metabolic processes (plural: mitochondrion). The chemical energy produced by the mitochondria is stored in a little molecule called adenosine triphosphate (ATP).
What do mitochondria have importance?As the energy generators in almost every human cell (as well as those of animals, plants, and fungi), mitochondria play a crucial part in generating energy to power cellular function and pretty much all of our biological activities.
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which stage of atherosclerosis is smooth muscle cell progression and proliferation involved in
In the early as well as late stages of atherosclerosis is smooth muscle cell progression and proliferation involved.
In both the early and late stages of atherosclerosis, vascular smooth muscle cells (VSMCs) play a significant role. The extracellular matrix-rich fibrous cap that VSMCs generate to protect the early atherosclerotic lesion's "necrotic" core covers the lesion when they invade it from the media. One significant step in the development of vascular lesions is smooth muscle cell proliferation (SMC).
Up until now, there hasn't been any concrete proof that mitogens play a part in the formation of arterial lesions, despite the widespread idea that growth factors play a role in the formation of atherosclerotic plaque. In reaction to vascular damage, during atherogenesis, and during smooth muscle cell migration. It has been discovered that migration activates a large number of proximal signals and signal transduction pathways.
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Repeated irrigation in dry climates leads to accumulation of salts in the upper layers of the soil, a process called ____.
Repeated irrigation in dry climates leads to accumulation of salts in the upper layers of the soil, a process called salinization.
Soil salinity is the amount of salt in the soil. The process of increasing the salt content is called salinization. Salt is a naturally occurring compound found in soil and water. Salinization can be caused by natural processes such as mineral leaching or the withdrawal of salt deposits from the oceans. Salinization can also occur due to human activities such as irrigation.
Causes of soil salinity
The accumulation of too much salt, especially on the surface, is caused by the movement of salt through the capillary process from the part in the soil which is filled with liquid with dissolved salts, to the surface. The evaporation process draws liquid from the soil to the surface, and the evaporated liquid leaves salt on the soil surface. Concentrated salt can also come from chemical fertilizers.
Salinization is a process caused by:
- high salt content in water
- landscape features that cause salt to move through the movement of groundwater
- climatic factors that cause salt accumulation
- human activities such as logging, irrigation, aquaculture, and salting to melt snow and ice.
- The high salt content causes soil degradation and vegetation is unable to grow on it.
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xhegg which phase of the action potential would be most affected by poisoning of the sodium-potassium atpase?
When the sodium-potassium at phase is poisoned, the action potential's rising phase is most likely to be impacted.
What impact does action potential have on sodium-potassium pump?The action potential created by nerve cells is significantly influenced by the sodium-potassium pump. The reason this pump is known as a P-type ion pump is that the ATP interactions phosphorylate the transport protein, changing its shape.
Why do potassium channels block affect the action potential?Action potentials are terminated, hyperpolarization occurs, and excitability decreases as a result of activation, which also increases conductance. When the channels are blocked, on the other hand, depolarization, prolonged action potentials, repetitive firing, and increases in transmitter release and endocrine activity result.
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atp synthases are found in the prokaryotic plasma membrane and in mitochondria and chloroplasts. what does this suggest about the evolutionary relationship of these eukaryotic organelles to prokaryotes? how might the amino acid sequences of the atp synthases from the different sources support or refute your hypothesis?
a) ATP synthase is a molecular machine. This enzyme (protein) is in fee of making ATP and is utilized by prokaryotes and eukaryotes. The truth that the equal enzyme seems in each organizations creates a dating due to the fact the perfect manner this will show up is via way of means of eukaryotes obtaining this mechanisms from prokaryotes. It is assumed that during truth this befell thru a manner referred to as endosymbiosis, wherein prokaryotic cells engulf different cells setting up a symbiotic dating. After hundreds of thousands of years it in the end have become 1 organism.
b) Since ATP synthase is a kind of protein one may want to assume that the amino acid series that creates this enzyme ought to be comparable among prokaryotes and eukaryotes and helping the concept that eukaryotes advanced from prokaryotes.
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in a pcr reaction, which step allows the primer to form hydrogen bonds with the template dna strand? g
The Annealing stage is where the primer is allowed to create hydrogen bonds with template DNA strand. Primers are single stranded DNA or RNA sequences, 20-30 bases long.
What is PCR?
The polymerase chain reaction (PCR) is a lab technique used to quickly amplify millions of copies of DNA segments, to be studied in detail. The Polymerase chain reaction is highly precise and is used for copying, amplifying specific DNA from a mixture containing different DNA molecules.
It has three simple steps:
Denaturation is where the double helix is denatured to single strands
Annealing is where primers are attached to the initial strands for synthesis of new strand.
And Extension is where the DNA strands are extended from primers.
PCR is now widely used for many things such as, cloning, mutation detection, microarrays, forensics, genotyping, etc.
Hence, annealing is the stage where primer forms hydrogen bonds with template DNA.
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a species of grass has a haploid number of 18. how many different types of gametes can be produced from meiosis in a diploid individual just with independent assortment (no crossing over)?
There are 2 x 10^18 types of gametes that can be produced from meiosis in a diploid individual just with independent assortment.
Meiosis is a type of cell division that halves the number of chromosomes in the mother cell and produces four gamete cells. The nuclei of cells in the G2 phase have twice the DNA content compared to cells in the G1 phase. Mitosis creates two identical daughter cells, each containing the same number of chromosomes as the parent cell.
In contrast, meiosis produces four unique daughter cells each with half the chromosomes of the parent cell. A specific formula 2n is used to calculate the total number of gametes produced by a particular genotype. where n is equal to the number of heterologous alleles found for the genotype. Here, a given genotype consists of two heterologous alleles, Bb and Cc, and one homozygous allele AA.
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enzymes that function in breaking down dna do so by catalyzing the hydrolysis of covalent bonds that join nucleotides together. what would happen to dna molecules when treated with these enzymes? responses all bases would be separated from the deoxyribose sugar all bases would be separated from the deoxyribose sugar the two strands of the double helix will separate the two strands of the double helix will separate the sugar phosphate backbone of dna strands would be broken the sugar phosphate backbone of dna strands would be broken the pyrimidines would be separated from the deoxyribose sugar the pyrimidines would be separated from the deoxyribose sugar
The backbone of the polynucleotide would lose its phosphodiester connections. Two ester bonds created in a phosphodiester connection when the hydroxyl groups of one molecule's hydroxyls bind molecule.
What functions do DNA polynucleotides serve?The covalent bonding between several nucleotide monomers form a polynucleotide. At least 14 nucleotide monomer chains, or polynucleotides, make up a single polynucleotide molecule. R- and D-ribonucleic acids are two examples of polynucleotides.
Where can one find polynucleotides?Adenine, guanine, cytosine, and thymine are the nitrogenous bases contained in DNA. Two polynucleotide chains, which are joined together in a ladder-like shape, make up DNA molecules. The two chains' sugar phosphate backbones run parallel to one another but in the opposite directions.
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what happens to the number of atp in aerobic glucose catabolism if pyruvate could not become oxidated?
The number of ATP in aerobic glucose catabolism if pyruvate could not become oxidated is converted produce heat.
Approximately 40% of the glucose's available energy is converted into ATP via aerobic respiration. Your comparatively high body temperature is produced by the remaining 60% of your body, which is wasted as heat. Although 40% efficiency may appear low, the top car engines are several times more efficient.
The vast majority of life on Earth uses aerobic cell respiration because it is superior to anaerobic respiration. However, using oxygen includes some expenses. Cellular processes can change oxygen into toxic forms that harm biological molecules. Because of this, you would perish within a few days if forced to breathe 100% oxygen instead of the 21% of our current atmosphere.
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4. what structure allows bacteria to sense and respond to their external environment and how do they achieve this
Bacterial quorum sensing, a technique that controls bacterial gene expression, is dependent on the adaptable chemical signaling molecules known as autoinducers.
These signals (autoinducers) differ between animals, just like languages do between people. Some bacterial species can understand a wide variety of signals, whereas others only react to a small number. Individual bacteria in colonies can cooperate and carry out colony-wide processes such sporulation, bioluminescence, pathogenicity, conjugation, competence, and biofilm formation thanks to quorum sensing. During a cholera infection, the notorious gram-negative pathogenic bacteria Vibrio cholerae uses quorum sensing for virulence.
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Which sentence supports the statement that complex , multicellular organisms are made up of specialized cells that each perform different functions for the body
Answer:
the sentence is cell differentiation
increased lumbar curvature, which compensates for the enlarging uterus in pregnant women, is called what?
Lordosis due to pregnancy is an increase in the lumbar curvature, which compensates for the enlargement of the uterus in pregnant women.
Pregnancy can cause a lot of discomfort. The increased burden due to the weight gain and size of the fetus can cause pain.
Not only that, pregnant women are also at risk of experiencing lordosis. This is a condition in which there is an excessive inward curvature of the lower back.
Lordosis Can Be Caused by Pregnancy
Pregnancy is clearly a risk factor for developing lordosis and other postural changes.
As the uterus grows larger, the body experiences a shift in its center of gravity. This puts a lot of strain on the lower back muscles as they have to compensate for the extra load.
In addition, the growing uterus causes the abdominal muscles to stretch and weaken. This further exacerbates the problem because the abdominal muscles help keep the pelvis in a neutral position.
Ultimately, the imbalance between the abdomen and lower back tilts the pelvis forward creating lordosis.
Lordosis can occur in the late second and early third trimesters of pregnancy. This is when the fetus grows the fastest and the uterus expands rather rapidly.
The larger the pregnancy, the more shifts in the center of gravity are experienced.
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In sickle cell anemia, the defective hemoglobin differs from the normal hemoglobin by?.
Hemoglobin S, an aberrant hemoglobin molecule, sticks to other hemoglobin molecules in sickle cell disease patients and forms long, rod-like formations.
What does hemoglobin do?Red blood cells include a protein called hemoglobin, which distributes oxygen to your blood carries oxygen while returning carbon dioxide to your lungs. A low red blood platelet count indicates a low hemoglobin level, which can be determined by a hemoglobin test.
Is a high hemoglobin count okay?A related dangerous ailment is unlikely to be indicated by a high hemoglobin count if there are no other abnormalities. Adults with congenital heart disease are one example of a condition that might result in a high hemoglobin count. symptoms of COPD getting worse.
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true or false: organisms intentionally induce mutations to occur in order to help them to adapt to their environment. group of answer choices true false
False: organisms intentionally induce mutations to occur in order to help them to adapt to their environment.
Regarding whether or whether their consequences are advantageous, mutations happen at random. As a result, advantageous DNA modifications do not occur more frequently only because an organism might profit from them. This, therefore, tells us that mutations are not induced intentionally by organisms.
Mutations are haphazard changes to DNA that can change genes and give organisms new features. Some mutations can result in features that are advantageous to organisms, whereas others often have no effect or a harmful consequence. For the most part, mutations have no discernible impact on the organisms in which they occur. Natural selection may increase the frequency of advantageous mutations. Negative mutations may result in cancer or genetic disorders.
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Four 5-gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. Use the following specific heat capacity data to determine which block will increase its temperature the most.
Substance Specific Heat Capacity (cal/g°C)
iron 0. 11
copper 0. 09
silver 0. 06
lead 0. 03
A. Iron
B. Copper
C. Silver
D. Lead
The change in temperature will be highest for lead metal. So option (D) is the correct answer.
To calculate the heat absorbed or released
q=mC×ΔT
where,
q = heat absorbed = 200.0 J
m = mass of the substance
C = specific heat of substance
ΔT = change in temperature
Amount of heat is absorbed and the mass is all the same. Therefore, the temperature change depends only on the specific heat.
ΔT = q/ mC
From the above we can see that the temperature change is inversely proportional to the specific heat. The higher the specific heat, the smaller the temperature change.
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finches that live in areas that only have large seeds and small seeds as a food source have adapted their beak sizes in response to this food availability. this is an example of selection. a. directional b. diversifying c. guided d. stabilizing e. uniform
Finches that live in areas that have large seeds and small seeds as a food source have adapted their beak sizes in response to this food availability and this is an example of selection a) directional.
What is the adaptation in the finches?Evolution in Darwin's finches is characterized by rapid adaptation to an unstable and challenging environment that caused ecological diversification and speciation. This resulted in striking diversity in their phenotypes like beak types, body size, plumage and feeding behavior.
The small finch evolved a small broad beak which it uses to feed on soft seeds and nuts although it is known to eat flowers, buds, young leaves, and the occasional insect. Unlike the large ground finch ,its beak would not be as strong to eat hard nuts and seeds.
Darwin's finches are an example of how natural selection has caused variation of beaks among the finches.
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If the antenna complex did not exist in a particular plant mesophyll cell, what effect would that have on photosynthesis?.
If the antenna complex did not exist in a particular plant mesophyll cell, the effect will be that no photosynthesis would occur.
The antenna complex is the main light capturing system in the plants. It captures the sunlight energy and excitation of electron takes place through it. The complex is actually a collection of the pigment chlorophyll and a few proteins.
Photosynthesis is the process of synthesizing food by plants in which they use the inorganic raw materials like sunlight energy, water and carbon dioxide to produce food in the form of sugars and also the by-product oxygen. The process occurs in two phases: light-dependent and light-independent.
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a phenotypically normal couple seek genetic counseling because the man's karyotype showed that his chromosomes had a reciprocal translocation between chromosomes 4 and 12. because the translocation is reciprocal there was no genetic information lost and he is healthy; however, he and his wife want to know the probability that his sperm cells will be abnormal. which fraction of his sperm cells is predicted to carry at least one chromosome with a translocation?
Three-fourth will have at least one chromosome with a translocation; the other 1/4 will carry normal chromosomes 4 and 12.
A karyotype is an person's entire set of chromosomes. The term additionally refers to a laboratory-produced image of someone's chromosomes isolated from an man or woman cell and arranged in numerical order. A karyotype may be used to look for abnormalities in chromosome range or structure.
Analyzing chromosomes through karyotyping allows your medical doctor to determine whether there are any abnormalities or structural problems inside the chromosomes. Chromosomes are in nearly every cellular of your body. They include the genetic material inherited from your mother and father.
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Marine Science Which of the following is essential to the nitrogen cycle?
a. rain
b. plants
c. plankton
d. hurricanes
g the increase in action potential conduction velocity due to myelination can best be explained by which of the following? a. a decrease in membrane capacitance. b. a decrease in membrane resistance. c. a decrease in longitudinal resistance.
The best can be explained as "the increase in action potential conduction velocity due to myelination" is a decrease in membrane capacitance.
What happened if the resistance of the membrane is increased?If the resistаnce of the membrаne is increаsed, more of the depolаrizing current pаsses down the аxon аnd dischаrges the cаpаcitor on the membrаne. Thus insulаting the membrаne with myelin increаses the pаssive spreаd of current аnd increаses conduction velocity. Decreаsing the membrаne cаpаcitаnce аlso increаses conduction velocity. Аdding myelin increаses the thickness of the membrаne cаpаcitor, which decreаses its cаpаcitаnce. Increаsing the diаmeter of the аxoplаsm decreаses the internаl resistаnce, which fаcilitаtes pаssive spreаd of current аnd increаses conduction velocity.
Thus, the correct answer is A.
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Mold is made up of many fungi cells. Mold would be considered what type of organism?.
Mold is considered a multicellular organism, made up of many fungi cells. Thus the correct answer is option (C) Multicellular Organism.
Multicellular organisms are made up of many cells thus it is different from unicellular organisms.
Some organisms, such as slime molds and social amoebae of the genus Dictyostelium, have both uni- and multicellular structures. These include every type of animal, as well as most fungi, terrestrial plants, and algae.
Colonies of identical individuals that come together to form organisms are called colonies. However, it can be difficult to distinguish between "colonial protists" and "real multicellular organisms" because the terms are interchangeable (colonial protists are occasionally referred to as "pluricellular").
A fungus with many cells is called mold. It is made up of hyphal filaments, which can group together to form mycelia. A mycelium is a collection of mycelia, and these structures make up the thallus, or body, of the mold.
The complete question is:
Mold is made up of many fungi cells. Mold would be considered what type of organism?
A. unicellular
B. prokaryotic
C. multicellular
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A teacher wants to know whether the scent of citrus in the classroom influences students' performance on the SAT math test.
During a first-period class, the teacher administers the test as usual with no fragrance in the room and records the students' scores.
During the second period, a different group of students enter the room. The teacher sprays the room with a citrus fragrance and administers the same math test. The teacher records the students' scores.
In this study, what is the independent variable and what is the dependent variable?
A. The independent variable is the teacher's first-period class, and the dependent variable is the second-period class.
B. The independent variable is the classroom, and the dependent variable is the teacher.
C. The independent variable is the score on the math test, and the dependent variable is the citrus smell.
D. The independent variable is the citrus smell, and the dependent variable is the score on the math test.
In this study, the option that is the independent variable and the dependent variable is C. The independent variable is the score on the math test, and the dependent variable is the citrus smell.
Which variable is dependent and which is independent?In mathematical modeling, statistical modeling, and experimental sciences, there are dependent and independent variables. Dependent variables are so-called because, during an experiment, their values are examined on the assumption or presumption that they are governed by the values of other variables.
Note that the cause is the independent variable. Its value is unaffected by the other study variables. Effect is the dependent variable. Changes in the independent variable affect its value.
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if we developed a molecule that blocked the atp synthase protein, what would be the expected immediate effect?
the output of ATP via OXPHOS is compromised and the energy metabolism is rewired to favor greater glycolysis, as a result of blocking the ATP synthase protein.
Test your knowledge on what occurs if ATP synthase is inhibited?The inner mitochondrial membrane has an ATP synthase proton channel. If that channel were blocked, the pH would increase even though the ETC would continue pump protons out of the matrix. Instead, there would be no way for them to enter again.
To stop ATP synthase, what would you aim to stop?Both the synthesis and hydrolysis of ATP by ATP synthase are inhibited by the antibiotics efrapeptins and aurovertins. The particular -subunit catalytic site is where the efrapeptins bind to ATP synthase at a region stretching from the rotor, across the enzyme's central cavity, and into the cavity.
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living organisms increase in complexity as they grow and this results in a decrease in the entropy of an organism. how does this contradict the second law of thermodynamics? explain how living organisms still obey the second law of thermodynamics despite their constant increase in order
Living organisms do not obey the second law of thermodynamics which states that an organism's entropy increases with each conversion of energy.
Organisms maintain order when the environment changes, and they become less ordered according to the second law of thermodynamics. These events actually work in concert when living organisms create ordered biological structures by increasing local entropy. Living organisms can gain or lose energy from the external environment.
Therefore, organisms are open systems. Since organisms are not closed systems, this does not affect the second law of thermodynamics. According to the second law of thermodynamics, all processes must cause a net increase in the entropy of the universe. It is true that entropy decreases and order increases as an organism grows. However, they release heat into the environment, increasing the entropy of the universe.
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the terms dominant and recessive apply to alleles that are found in a population at a very high rate (dominant alleles), and a very low rate (recessive alleles) select one: true false
"The terms dominant and recessive apply to alleles that are found in a population at a very high rate (dominant alleles), and a very low rate (recessive alleles)" can be considered as a false statement.
In terms of alleles, dominant refers to the relationship between two gene versions. Organism individuals receive two versions of each gene (alleles), one from each parent. If the alleles are different, only one of them will be expressed. The expressed one is called the dominant gene. The masked one (the one that doesn't get expressed) is called the recessive allele. Recessive alleles only show if the organism has two copies of the allele (no dominant allele).
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evolutionary theory predicts that alleles causing dominant disorders will be found at lower frequency in a population than recessive disorders (assuming all else is equal). what evolutionary force explains this difference?
Evolution is governed by four forces: mutation, gene flow, genetic drift, and natural selection. A gene pool undergoes mutation to produce new genetic variety. Allele frequencies in a gene pool are altered through gene flow and genetic drift.
Why does evolution force exist?THE EVOLUTIONARY FORCES. Today, we understand that evolution occurs as a result of a number of factors, including mutation, genetic drift, gene flow, and natural selection. The "forces of evolution" are these mechanisms, and they collectively can explain all of the genotypic variety currently seen in the globe.
What driving force in evolution is most significant?The most significant driving force behind evolution is natural selection, which involves nature choosing the organisms that can reproduce and live in a changing environment over the less capable ones.
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If one DNA strand reads CCGTAATGCAT, what will be the sequence of the complementary strand?
