Chapter 49 Outline
Interactions within Communities
Competition between organisms, predation, antipredator
defenses, mimicry, and symbiotic relationships are topics covered
in this chapter.
Chapter Outline
In this chapter outline, the learning objectives
and the selected key terms are given for each major head in the
chapter.
When Organisms Compete (p. 850)
1. Discuss the effect that interspecific competition can have on population size.
2. State the competitive exclusion principle, and relate this principle to the diversity
of organisms.
3. Distinguish between the niche and the habitat of an organism.
Selected Key Terms: community, competitive exclusion principle, niche, habitat
When Organisms Are Predators (p. 852)
4. Discuss the effect that predation can have on the size of the prey population and
on the diversity of the community.
5. Give examples to show that human intervention can upset the natural balance
of a community.
6. Give examples of plant and animal antipredator defenses.
7. Explain the principle of mimicry, and give examples of the two kinds of mimicry.
mimicry
When Organisms Depend on Another (p. 854)
8. Give examples of the three types of symbiotic relationships, and explain what
effect they can have on population size.
symbiosis, parasitism, commensalism, mutualism
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