2. C. Australia
3. They show analogous structures, where there are many similarities, such as similar functions, but the underlying structure is completely different, and they evolved from different ancestral structures.
4. The Common Descent lab uses DNA evidence to show how species are related, and how closely related they are. For example, in the lab, chimpanzees are proved to be more closely related to humans than gorillas are related to humans.
5. Homology is the relationship between structures based on the same ancestral structure. One example of homology is the similarities between the arm of a primate and the arm of a bat.
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