In a changing environment, the species which will have the best chances for survival are the one with the biggest genetic variation. Thus, the correct option is C.
Genetic variation is the difference in DNA present among different individuals or the differences between the populations. The multiple sources of genetic variation include mutations and genetic recombination in species. Mutations are the ultimate source of genetic variation, however other mechanisms, such as genetic drift, contribute to it, as well.
Variation allows some individuals within a population to adapt better to the changing environmental conditions. Because, the natural selection acts directly only on phenotypes, more genetic variation within a population usually enables more phenotypic variation in a population.
Therefore, the correct option is C.
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Answer:
one with the largest poplation because they can cook,protect, and get supplies .
Explanation:
B) Chromosphere
C) Corona
D) Prominence
Answer:
A) Photosphere
Explanation:
The three significant differences between meiosis I and meiosis II: Chromosome pairing and recombination, Number of chromosomes, and Recombination events.
1. Chromosome pairing and recombination:
Meiosis I: During prophase I of meiosis I, homologous chromosomes pair up and undergo genetic recombination (crossing over) where genetic material is exchanged between non-sister chromatids. This results in increased genetic diversity.
Meiosis II: Chromosome pairing and recombination do not occur in meiosis II. Instead, the goal of meiosis II is to separate the sister chromatids produced during meiosis I.
2. Number of chromosomes:
Meiosis I: At the start of meiosis I, the cell is diploid (2n), meaning it has a full set of chromosomes. Homologous pairs of chromosomes align and separate during anaphase I, resulting in two haploid cells with half the number of chromosomes (n) as the original cell.
Meiosis II: The cells resulting from meiosis I enter meiosis II. The number of chromosomes remains the same throughout meiosis II. Sister chromatids separate during anaphase II, resulting in the production of four haploid cells.
3. Recombination events:
Meiosis I: Meiosis I allows for recombination events between non-sister chromatids of homologous chromosomes. This crossing over increases genetic diversity and introduces new combinations of alleles.
Meiosis II: Meiosis II does not involve recombination events. Instead, the focus is on separating the sister chromatids that were produced during meiosis I, ensuring each resulting cell receives a complete set of chromosomes.
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2)sister chromatids.
3)stem cells.
4) macrophages.
Answer:
option 2
Explanation:
because there divide
Answer: Phospholipid bilayer.
Explanation: This lipid bilayer is fluid, with individual lipid molecules able to diffuse rapidly within their own monolayer.
The vaccine wears out over time?
The flu virus changes every year <----?
The body eliminates the vaccine
Answer:
The correct answer would be the third option.
Vaccination refers to the administration of weekend or attenuated microorganism or antigen in the body. It helps in developing adaptive immunity in the body.
Thus, vaccine neither wears out with time nor body eliminates the vaccine.
However, the flu virus changes every year due to the short life cycle. Consequently, the memory B cells cannot recognize changed virus due to which the body loses its immunity against the virus.
This is why doctors recommend that people should get flu shot each new flu season.