Explain how the allocation of carbon to plant roots influences net carbon gain by plants.
7) Define ectothermy, endothermy, poikilothermy, homeothermy, and heterothermy, and give examples of organisms that use each strategy.
8) Discuss several strategies used by animals to maintain body temperatures within the thermoneutral zone during extreme cold and extreme heat.
9) Discuss the physiological changes that occur in organisms when they go into daily or seasonal torpor.
10) Discuss the three distribution patterns of individuals within a population and explain the conditions that give rise to each pattern.
11) Describe several approaches used by ecologists to establish age structure for plant and animal populations.
12) Some animals migrate daily, whereas others migrate seasonally. Give an example of each type of migration pattern and explain the benefit of this pattern to the organisms exhibiting it.
13) Describe and illustrate exponential population growth. Under what conditions would exponential growth be expected to occur?
14) Define four types of birthrates and reproductive rates. How are these related to the age of individuals and the growth rate of populations?
15) Discuss five factors known to cause extinction. Which factor is considered the leading cause of current extinctions and why?
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