Question

What three things provide evidence for the genetic relationships among organisms?

Answer 1

Answer:

For the answer to the question above, the genetic evidence of phylogenetic relationships proves that organisms that are different now shared common ancestors. 

The fossil record shows how organisms have evolved. 

You could use the example of how humans have significantly changed the form of many animals by selective breeding. 

There is evidence of adaptive radiation like the tortoises or finches of Galapagos. It also exists in the similarity of many species like all the different species of cats, horses, dogs

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Answer 2

Answer:

Molecular biology. DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are.

Biogeography. The global distribution of organisms and the unique features of island species reflect evolution and geological change.

Fossils. Fossils document the existence of now-extinct past species that are related to present-day species.

Direct observation. We can directly observe small-scale evolution in organisms with short lifecycles (e.g., pesticide-resistant insects).

Explanation:

idk if it's good. sorry