Animal Classification
To complete this activity, you must answer each of the questions and when you are finished,
use the key to check your responses.
Part I.
1. What happens when an animal respires?
2. What is the function of a circulatory system?
3. Why must all living things excrete waste products?
4. What are the 3 subphyla of Chordates?
5. How might sexual reproduction help a species to cope with environmental change?
6. What are some characteristics of complex animals?
7. How do the body plans of animals with bilateral and radial symmetry differ?
8. What is the relationship between the degree of cephalization and the complexity of
the animal?
9. What characteristics do all animals share?
10. What are seven essential functions that animals carry out?
Complete the table below:
Category
Percentage of Species
Description
95%
Animals WITHOUT backbones
5%
Animals WITH backbones
Examples