Give at least three features that all animals have in common.
1. Give at least three features that all animals have in common.
2. What were the two major branch points in animal evolution?
3. What animals lack tissues?
4. What is the difference between radial and bilateral symmetry? Give two examples of animals that demonstrate each category.
5. What is a body cavity?
6. What is the difference between a vertebrate and an invertebrate? Are invertebrates or vertebrates more numerous?
7. What are the most abundant invertebrates? List the characteristics of this group of animals.
8. What is a tetrapod? Give three examples of tetrapod.
9. What is the difference between an exoskeleton and an endoskeleton? Give two examples of animals with each.
10. What are the four embryonic features of a chordate?
11. What is the difference between an endotherm and an ectotherm?
12. What is an amniote? Give two examples of amniotes.
13. What two characteristics describe mammals?
14. List the three different types of mammals. Give two examples of animals from each group.
15. Humans are placed into which group of mammals?
16. What are the characteristics of primates?
17. Besides humans, what other animals are included in the primates?
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