Which of the following are pieces of evidence showing common ancestry among species?

1. The pieces of evidence that support the theory of evolution include the following:

a. Fossil records/evidence

b. DNA of the organisms

c. Comparative anatomy

2. Whales have features that are similar to land mammals, such as the presence of hip bones and the need to breathe air. In this case, the whale fossils indicate that the modern whales that we see today have evolved from the land-dwelling mammals that existed 50 to 70 million years ago.

3. According to Darwin’s theory of evolution through the process of natural selection, the presence of a trait that is observed throughout the timeline of divergence of species is used as evidence that supports the idea that certain organisms share common ancestors.

In this case, comparative anatomy can provide the scientists the evidence that the organisms which share anatomical or structural similarities have common ancestry; hence, supporting the theory of evolution.

Explanation:

answer: "circumcision is a common procedure in which the skin covering the tip of the penis is surgically removed."

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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