The change in crab color is an example of Disruptive selection because two extreme colors were preferred over the more moderate color. Thus, the correct option for this question is D.
<h3>What is Natural selection?</h3>
Natural selection may be defined as the selection of a few individuals from any given population according to their favorable variations.
Disruptive selection occurs when environmental conditions changes in two different directions. Due to which variance increases in population.
Therefore, the correct option is D.
To learn more about Natural selection, refer to the link:
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Answer:
50% medium tail and 50% short tail.
Explanation:
Let the allele that controls the tail length in cat be represented by T.
Cats with short tail length will have the genotype of tt.
Cats with long tail length will have the genotype of TT.
Since the trait exhibit incomplete dominance, cats with medium tail length will have the genotype of Tt.
A short tail cat (tt) is crossed with a medium tail cat (Tt).
tt x Tt = Tt, tt, Tt, and tt
<em>Recall that phenotypically, Tt = medium tail and tt = short tail. Hence, 1/2 or 50% of the offspring will have medium tails while the remaining 1/2 or 50% will have short tails.</em>
Hence, the possibilities are 50% medium and 50% short tail cats.
I think the correct answer from the choices listed above is the last option. The control group to be used to test the hypothesis would be the swallows with average-length tails. A control group <span>is defined as the </span>group<span> in an experiment or study that does not receive treatment by the researchers.</span>
Answer:
Addition of enzymes will increase the speed rate of DNA replication.
Helicase:
It is responsible for DNA strands unwinding and unzip the DNA strands from their center.
Primase:
It is responsible for 5' to 3' direction RNA primers synthesis, okazaki fragment's template.
Polymerase 3:
It synthesize the nucleotides from the 5' to 3' direction on leading end.
Polymerase 1:
It synthesize the nucleotide (okazaki fragments) on lagging strand.
Ligase:
It connects all okazaki fragments.
Topoisomerase:
Topoisomerases are used to regulate the super coiling.
