The answer is ‘ The genetic variation introduced during recombination provides new allelic combination on which natural selection to act upon’. For a population to be well adapted to an environment and its dynamic and random changes, it has to have a wide variation in genotypes and phenotypes. This way some individuals are able to survive drastic changes and pass their genes to the successive generations, that is if the majority of the population is not able to survive a calamity such as disease (bottleneck effect).
Genetic recombination, resulting from mutation and sexual reproduction, fosters genetic diversity by creating new combinations of genes. This diversity enables populations to adapt to changes in their environment, thereby driving evolution. The concepts of gene recombination and its contributions to evolution are underpinned by the principles of Darwin's natural selection and Mendel's independent assortment and linkage.
Explanation:Genetic recombination influences evolution by increasing genetic diversity in a population. Primary mechanisms of genetic diversity include mutation and sexual reproduction. Mutation, a change in DNA, can introduce new alleles into a population. The effects of these mutations range from neutral to significantly altering an organism's fitness. On the other hand, sexual reproduction creates unique combinations of alleles, producing diverse genotypes and phenotypes in offspring.
Furthermore, during meiosis in sexually reproducing organisms, crossing-over events and independent assortment of chromosomes contribute to genetic diversity. New combinations of parental genotypes are formed in the diploid offspring, enabling adaptation to environmental changes.
The concept of genetic recombination and its influence on evolution is grounded in Charles Darwin's theory of natural selection and Mendel's principles of independent assortment and linkage. For example, Sturtevant's work represented alleles in a linear map, suggesting that gene linkage and recombination frequency could range widely depending on their location on the chromosome. This contributes to the understanding of genetic diversity and evolution.
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In the case of the bombina frogs given in your text, there was evidence of hybridization because
b. variegata (yellow-bellied toads) genes were present in the
b. bombina (fire-bellied toads) in the hybrid zone but the frequency decreased across the hybrid zone with distance from the yellow-bellied toad range. what was the evidence that hybrid zone stability was occurring? in the case of the bombina frogs given in your text, there was evidence of hybridization because
b. variegata (yellow-bellied toads) genes were present in the
b. bombina (fire-bellied toads) in the hybrid zone but the frequency decreased across the hybrid zone with distance from the yellow-bellied toad range. what was the evidence that hybrid zone stability was occurring?
In the case of the Bombina frogs, the evidence that hybrid zone stability is occurring was the consistent pattern from annual to annual of declining frequency of yellow-bellied toad alleles with distance from the edge of their range. This is a clear evidence that hybridization is taking place yearly in the Bombina frogs.
Answer:
On account of the Bombina frogs, the proof that half and half zone.
Explanation:
strength is happening was the steady example from yearly to yearly of declining recurrence of yellow-bellied frog alleles with separation from the edge of their extend. This is an unmistakable proof that hybridization is occurring yearly in the Bombina frogs.orbital hybridisation is the idea of blending nuclear orbitals into new half and half orbitals appropriate for the matching of electrons to shape synthetic bonds in valence bond hypothesis.
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What is the mRNA sequence and tRNA sequence of ATGGGCTTAGCA
Ovulation typically occurs ________ days before the menstrual period begins. question 90 options: 7 10 20 14
Ovulation, the release of a mature egg from the ovary, usually happens approximately 14 days before the start of the menstrual period. It is part of the menstrual cycle which can vary in length between different women.
Explanation:In a woman's menstrual cycle, ovulation typically occurs about 14 days before the next menstrual period begins. This is generally the case for cycles that are around 28 days long, which is often used as a standard, but please note cycle lengths can vary between women and from one cycle to another for the same woman. Ovulation is the process when a mature egg is released from the ovary, and this egg is then available to be fertilized by sperm.
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Ovulation typically happens around 14 days before the menstrual period begins considering a usual menstrual cycle of 28 days. It is a phase of the menstrual cycle when the mature egg gets released from the ovaries.
Explanation:Ovulation, being a part of the menstrual cycle, typically happens approximately 14 days before the menstrual period begins. The menstrual cycle varies among women, typically around 28-30 days. It's split into multiple phases: menstrual phase, follicular phase, ovulation, and luteal phase. Ovulation occurs during the midpoint of the cycle when the matured egg is released from the ovaries. If it doesn't get fertilized, the lining of the uterus sheds, leading to the menstrual period. Therefore, if we consider an average menstrual cycle of 28 days, the ovulation should be on the 14th day, which makes it roughly 14 days before the menstrual period.
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Maddy, Carole, and Maria are enjoying a day at the beach. They are body surfing and playing on their boards. Imagine that wave A catches up with wave B. Describe the change, if any, in wave amplitude.
As electrons are passed through the electron transport chain associated with photosynthesis, they lose energy. what happens to this energy?
a.it is used to phosphorylate nad+ to nadph, the molecule that accepts electrons from photosystem i.
b.it is lost as heat,
c.it is used to establish and maintain a proton gradient.
d.it excites electrons of the reaction center of photosystem i.
Low-energy electrons destroy oxygen molecules and produce water as they move through the electron transport chain, losing energy as they do so. Thus, option C is correct.
What proton gradient cause in electron transport chain?The electron transport chain in particular utilizes the energy from the electrons on NADH and FADH2 to pump protons (H+) into the intermembrane gap.
As a result, there is a proton gradient between the mitochondria's matrix and intermembrane space.
Hydrogen is pumped out of the matrix space by the energy released. As a result, a gradient is produced that forces hydrogen back through the membrane via ATP synthase.
Therefore, electron transport chain associated with photosynthesis, they lose energy because it is used to establish and maintain a proton gradient.
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If your doctor told you that you have trep throat, you could conclude that you are infected with which type of pathogen?
Which form of prevention takes place after the precursors of disease interact with the host?
Secondary prevention is the type of prevention that takes place after the precursors of disease have interacted with the host. This often involves interventions such as vaccination, which induce immunological memory, and measures taken during the period of decline to prevent secondary infections.
Explanation:The form of prevention that takes place after the precursors of disease interact with the host is called secondary prevention. This falls in the phase of illness where symptoms have appeared and intervention is required to halt the process of the disease. A primary example of secondary prevention in action is the vaccination program. With vaccinations, your body generates immunological memory, allowing you to combat the disease more vigorously upon exposure in the future, because it can mobilise a strong secondary response.
Secondary prevention strategies also include actions during the period of decline, where the number of pathogens starts to decrease along with symptoms. Due to the immune system having been busy fighting off the primary infection, this period can leave an individual susceptible to secondary infections, which prevention measures should also aim to mitigate.
Therefore, secondary prevention occurs at the stage where the disease onset has already happened and early treatment is used to cure or stop the progression of the disease, thereby lowering its impact on the host's health.
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Drag the words or phrases on the left to the appropriate blanks on the right to complete the sentences. use only pink labels (reservoirs) for pink targets and blue labels (processes) for blue targets. not all terms will be used.
Which is part of the theory of evolution by natural selection apex?
The theory of evolution by natural selection suggests that organisms best adapted to their environment are most likely to survive and pass on their characteristics. Evolution acts on existing variations in a population and does not aim at creating the 'perfect' organism. This theory explains the unity and diversity of life.
Explanation:The theory of evolution by natural selection, also known as survival of the fittest, suggests that organisms best adapted to their environment are most likely to survive and pass on their characteristics to their offspring. An important thing to acknowledge is that evolution is not aimed at perfection. Instead, it acts on existing variations in a population, not creating anything new, but rather choosing the most fitting among the available.
Natural selection was proposed by Darwin and is considered the unifying theory of biology. It postulates that all life has evolved and diversified from a common ancestor due to a process called mutation. Mutation gives rise to variations in a population, which if favorable, are passed on to the next generations through reproduction.
The theory of evolution embraces both the unity and diversity of life, explaining why organisms may have common traits (unity) while also having unique characteristics that differentiate them from one another (diversity).
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When we look at islands across the planet (think the islands of the galápagos and hawaii) we see that there are a remarkable number of island endemic species, species that are found nowhere else. what is a possible explanation for this observation?
A remarkable number of species on an island that are found nowhere else is a result of island isolation that promotes allopatric speciation where there is an evolution of species caused by the geographic isolation of two or more populations of a species. These results to increase biodiversity of species found on the island.
Arteries carry oxygenated blood away from the heart and typically have ________________ blood pressure. Veins carry deoxygenated blood to the heart and typically have __________________ blood pressure.
a. low,low
b.high,low
c.low,high
d.high,high
Arteries carry oxygenated blood away from the heart and typically have high blood pressure. Veins carry deoxygenated blood to the heart and typically have low blood pressure. This is the reason behind the 120/80 - 140/90 mmHg blood pressure that is seen during the measurement of the blood pressure. Arteries have blood in high pressure and large quantity as the heart pushes the blood away from it to the various organs. Veins carry the blood away from the organs due to the pull of the heart, this creates a low pressure zone inside the veins.
Give explain and characteristics of Protisia? It's the kingdoms.
People with pure autonomic failure lose nervous system control over their heart rate, breathing, sweating, etc. what, if anything, happens to their emotions?
(05.01 MC) How do wetlands abiotically help to protect the water quality of a marine ecosystem? They cause areas to flood into larger water bodies. They cause the water to be filled with tannins. They filter sediments and other material from runoff. They prevent water from being stored in their areas.
Answer:
They filter sediments and other material from runoff
Explanation:
Wetlands are places that are mostly ‘wet’ most of the time of the season and are filled with aquatic plants and riparian vegetation. Most of the time this water is still and anoxic. Wetlands are important because they allow the sediments in the still waters to settle, and also the ecosystem takes out the nutrients/dissolved molecules hence purifying the water before it is released into the water bodies such as oceans and lakes.
What effect would it have on the circulatory system if a person quit smoking?
This is a simple sugar that provides energy to organisms
The simple sugar that provides energy to organisms is glucose.
Glucose is the monosaccharide and primary source of energy for living organisms. It is a type of carbohydrate and is often referred to as "blood sugar" because it circulates in the bloodstream and is utilized by cells throughout the body to produce energy.
During cellular respiration, glucose is broken down in the presence of oxygen to release energy in the form of adenosine triphosphate (ATP). ATP is the primary energy currency of the cell, and it fuels various cellular processes and activities, allowing organisms to perform essential functions like growth, movement, and metabolism.
Glucose is obtained through the digestion of carbohydrates in the diet, such as those found in foods like fruits, vegetables, grains, and sugary products. Once absorbed into the bloodstream, glucose is transported to cells where it undergoes cellular respiration to release energy, making it a vital energy source for all living organisms.
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--The given question is incomplete, the complete question is
"This is a simple sugar that provides energy to organisms is -----------."--
Consider a closed ecosystem which contains only mosquitoes and frogs. the mosquitoes feed on the blood of the frogs, and the frogs eat the mosquitoes. this ecosystem is impossible because:
In a 10 m2 ecosystem, there are 40 possums. What is the population density of possums? 2 per m2 4 per m2 10 per m2 40 per m2
the above answer is incorrect, i chose it. the CORRECT answer is B. hope this helps.
Answer:
Option B, 4 per m2
Explanation:
The population density of any species or human is the number of species or human beings living in a unit area.
Thus population density can be represented mathematically as
Population density [tex]= \\[/tex] Number of species/Human beings in a given region[tex]/\\[/tex] Area of the region ----------------Eq (A)
Given -
Area of the ecosystem [tex]= 10 m^{2} \\[/tex]
Total number of possums [tex]= 40\\[/tex]
Substituting the value in equation A, we get -
[tex]\frac{40}{10m^{2} } \\= 4 m^{2} \\[/tex]
Thus, option B, is correct.
The role of chlorophyll in photosynthesis is to A. Pass electrons to the stroma B. Split water molecules C. Absorb light energy D. All of the above
You and a fellow lifeguard are giving ventilations using a bvm. you position the mask over the victims nose and mouth. what should the other lifeguard do next
The other lifeguard should use both hands to form a tight seal around the mask.
Why should the other lifeguard do this?They should then look, listen, and feel for signs of breathing. If they do not see the victim's chest rise or hear any breath sounds, they should start giving rescue breaths.
The rescue breaths should be given at a rate of 10-12 per minute. The lifeguard should use their diaphragm to breathe into the mask, making sure to form a tight seal. They should watch the victim's chest rise and fall to make sure that they are getting air.
If the victim starts breathing on their own, the lifeguard should continue to monitor their breathing. If the victim stops breathing again, the lifeguard should start rescue breaths again.
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The affective losses of alzheimer's disease refer to losses noticed in the individual's:
Which main force can cause a landslide? A. magnetism B. convection C. gravity D. pressure on fault lines
True or false: certain household plants, such as mistletoe, can be toxic to birds. ansc207
Which type of climate has no winters
A: humid tropical
B: dry
C: polar
D: highland
Answer:
Option (A)
Explanation:
Winters are usually characterized by the presence of low temperatures and shorter duration of the day, and it occurs between the season of autumn and spring. This type of cold climate occurs mainly in the high elevated region, higher latitudinal location such as polar regions and is mostly comprised of dry air.
The humid tropical type of climate occurs in the region between the two tropics and is characterized by the presence of high temperatures and heavy rainfall, as these regions are exposed to the maximum amount of sunlight.
Thus, the humid tropical type of climate has no winters.
Hence, the correct answer is option (A).
A biome is a broad category of ecological organization that includes all of the biotic and abiotic components of an entire climate region, such as a desert or a rainforest. Which of the following categories of ecological organization is broader than a biome?
cell structure varies depending on its what?
Answer:
The correct answer is function.
Explanation:
The structure of a particular cellular constituent has a lot to do with its activity. It can also be said that structure dictates function. Let us consider an example of chloroplast and mitochondria, it is only the compositions of these two organelles that permits the procedures of photosynthesis and cellular respiration to take place.
In both the organelles, the existence of the membrane permits for compartments to develop. These compartments can exhibit distinct hydrogen ions concentration, and it is because of these differences in concentration the formation of essential substances takes place.
What are the 6 steps of hypothesis testing? (state the 6 steps)
a.
b.
c.
d.
e. f)?
Jenna made this model to show the processes which resulted in the formation of oceans.
Which of these statements best describes a flaw in Jenna's model?
Water filled the basins after sea floor spreading.
Water filled the basins after segments of Earth's crust moved.
Earth's crust was formed after water filled the basins.
Earth's crusts were broken down after the process of sea floor spreading.
The answer is Earth's crust was formed after water filled the basins.
There is a flaw in this statement because the earth’s crust is the top-most layer of the earth that occurs across the whole of the earth. Actually, the reverse happens, the oceans sit on top earth’s crust therefore cannot be formed after water filled the basins.
Earch if formed thats the answer Hope it help ly
The latitudes in this biome have evenly distributed precipitation throughout the year.
Answer:
The answer is Lower scopes of Coniferous Forests.
Explanation:
In the lower scopes of coniferous backwoods, precipitation is all the more uniformly disseminated consistently. This can be discovered in Canada, Europe, Asia, and the United States; they generally comprise of conifers trees that develop needles and cones rather than leaves and blooms separately.
What is the central dogma of biology identify and describe the molecular processes that accomplisht he flow of genetic information described in the central dogma?
Final answer:
The central dogma of biology outlines the flow of genetic information from DNA to mRNA to protein, primarily through the processes of transcription and translation. Transcription makes an RNA copy of a gene, and translation uses that RNA to build a protein.
Explanation:
Central Dogma of Molecular Biology
The central dogma of molecular biology describes the flow of genetic information in cells from DNA to RNA to protein. The genetic information is first transcribed into messenger RNA (mRNA) during transcription, and then the mRNA is translated into a protein during translation.
Transcription
Transcription is the process by which a segment of DNA is copied into mRNA. This occurs when the cell needs a particular protein, and the gene responsible for that protein is activated. As the DNA is transcribed, nucleotides are matched to synthesize the single-stranded mRNA molecule.
Translation
Translation is the process whereby the sequence of the mRNA is used to dictate the correct order of amino acids that make up the protein. This involves reading the mRNA nucleotides in groups of three, known as codons, with each codon corresponding to one specific amino acid. Thus, a protein's structure is determinate by the nucleotide sequence of the gene.