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According to the logistic growth model, what happens to a population when the size of the population reaches carrying capacity? |
the growth rate is zero |
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An unexpected freeze that kills a population of chipmunks is an example of ______. |
a density-independent factor |
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If a population’s growth rate decreases as the population size approaches carrying capacity, the population’s growth follows a(n) ______ model. |
logistic |
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In a population that is following a logistic growth pattern, what shape does the population’s growth curve most closely resemble? |
S |
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In an ideal, unlimited environment, a population’s growth follows a(n) ______ model. |
exponential |
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Non-native species can have important effects on biological communities by ______. |
doing all of the above |
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Opportunistic species typically ______. |
have a large number of offspring |
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Species that exhibit an equilibrial life history typically ______. |
have long lives |
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The Endangered Species Act aims to help protect species that ______. |
are in danger of extinction |
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The ecological footprint of the United States ______. |
shows that Americans consume a disproportionate amount of food and fuel |
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Type I survivorship curves are typical of species that exhibit ______. |
few offspring and good parental care |
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What is a population? |
a group of organisms that occupy the same general area |
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Which of these best describes Type II survivorship? |
survivorship is constant over the lifespan |
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Which of these best describes Type III survivorship? |
survivorship is high for the few individuals that survive to a certain age |
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Which of these factors operates in a density-dependent manner? |
food supply |
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Which of these is a characteristic of Type I survivorship? |
most individuals survive to older age intervals |
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______ is the maximum population size that a particular habitat can support. |
carrying capacity |
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