More than 1.5 million species of animals have been described, yet scientists believe that all animals evolved from a single, common ancestor. Which of the following provides the best evidence for this conclusion?

EVIDENCE FOR EVOLUTION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	Animals share similar fossils.
B	Animals share similar behaviors.
C	Animals share similar appearances.
D	Animals share similar DNA sequences.

Explanation:

Detailed explanation-1: -Evidence of a common ancestor for all of life is reflected in the universality of DNA as the genetic material, in the near universality of the genetic code, and in the machinery of DNA replication and expression. In general, the relatedness of groups of organisms is reflected in the similarity of their DNA sequences.

Detailed explanation-2: -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.

Detailed explanation-3: -Evidence for evolution: anatomy, molecular biology, biogeography, fossils, & direct observation.

Detailed explanation-4: -Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.

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