Read the following textbook pages: Chapter 26, 552 – 563 & 566 – 568
Answer the following Concept Questions:
1. Humans and chimpanzees are sister species. Explain what this statement means.
2. Why is it necessary to distinguish homology from analogy to infer phylogeny?
3. Decide whether each of the following pairs of structures more likely represents analogy or homology, and explain your reasoning:
a) a porcupines quills and a cactuss spines
b) a cats paw and a humans hand
c) an owls wing and a hornets wing
4. Explain the logic of using shared derived characters to infer phylogeny.
5. Why was the five-kingdom system abandoned for a three-domain system?

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