Question 1

What factors determine the growth rate of a population?

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Question 2

What is the term for regular population cycles of rapid growth followed by massive die-off?

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Question 3

Why does a bacteria population have a higher biotic potential than a population of humans?

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Question 4

Explain what happens in exponential population growth.

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Question 5

Human populations have continued to grow because humans have increased Earth's ________ through agriculture, medicine, and technology.

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Question 6

How does the environment limit population growth?

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Question 7

When predators and prey both have population cycles, the predator cycle tends to ________ the prey cycle.

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Question 8

How do interspecific and intraspecific competition differ?

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Question 9

When a population stops growing because it has reached the maximum number that the environment can support, we say that the population has reached what?

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Question 10

A population that initially grows rapidly and then slows and eventually stabilizes close to the carrying capacity of the environment exhibits ________ population growth.

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Question 11

Parasites often kill their hosts, although they do not directly benefit from their hosts' death. Yet many ecologists believe that parasites may have beneficial effects on their host populations. Why?

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Question 12

Write an equation that describes a situation in which a population remains stable.

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Question 13

How does environmental resistance affect a population?

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Question 14

Predation is considered to be a density-________ factor that controls the size of the prey population.

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Question 15

A species with high biotic potential that is transferred to a new environment where it has little environmental resistance is called a(n)________ species.

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Question 16

Competition among individual members of the same species is referred to as ________ competition.

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Question 17

Predation is considered to be a density-dependent factor that controls the population size of prey species. Give two examples of predators acting in density-dependent ways in response to fluctuations in the size of prey populations.

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Question 18

If adults of reproductive age are having just enough children to replace themselves, then the population is said to have ________ fertility.

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Question 19

________ factors become more effective at limiting population growth as the size of the population increases.

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Question 20

In the United States today, there is a trend toward women having their first child in their late 30s or early 40s. In contrast, a few decades ago, most women started having children in their early 20s. What effect would you expect this change to have on population growth in the United States? Would it have any effect if the number of children per woman remains the same? Explain.

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Quiz 26: Population Growth and Regulation