Please place the answers to the following questions on your own paper.
Use complete sentences to form your responses to these questions.

1.    What are biotic factors?  (p. 484)
2.    List two examples of biotic factors.  (p. 484)
3.    What are abiotic factors?  (p. 484)
4.    List three examples of abiotic factors.  (p. 484)
5.    What do we call any characteristic of an organism that allows it to fit in with its environment?
       (p. 487)
6.    What is a habitat?  (p. 488)
7.    What do we mean by the niche of an organism?  (p. 488)
8.    What is a population?  (p. 507)
9.    What is a community?  (p. 507)
10.  Explain what is meant by population density?  (p. 508)
11.  What is meant by the growth rate of a population?  (p. 510)
12.  What is the meaning of the term carrying capacity?  (p. 511)
13.  All ecosystems must have a source of energy.  What is the source of energy for
       most ecosystems on earth?  (p. 531)
14.  Why are plants producer organisms?  (p. 531)