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10 Cards in this Set
- Front
- Back
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To figure out the human population density of your community, you would need to know the number of people living there and __________. a. whether population growth is logistic or exponential b. the size of the area in which they live c. the dispersion pattern of the population d. the carrying capacity e. the birth rate of the population |
B |
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An example of population density is __________. a. 255 dogfish sharks b. the number of Paramecium caudatum in a 250-milliliter solution within a glass flask c. 100 organisms (barnacles, mussels, and sea stars) in a 25-square-meter tide pool d. the total dry weight of trout in a lake e. the total number of sturgeon per cubic meter in San Francisco Bay and in Tomales Bay |
B |
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A population is defined as __________. a. a group of individuals of a single species that occupies the same general area b. all the abiotic factors in addition to the community of species in a certain area c. a specific environment in which organisms live d. the sum of all the planet's ecosystems e. all the organisms that inhabit a particular area |
A |
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The single greatest current cause of population decline is __________. a. habitat destruction b. greenhouse warming c. reduced genetic variability d. overhunting e. the introduction of exotic species |
A |
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A non-native species that has spread far beyond the original point of introduction and causes environmental or economic damage is called a(n) _____. a. predator b. population c. threatened species d. invasive species e. endangered species |
D |
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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? a. ∩ b. ∪ c. ∧ d. S e. J |
D |
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In an equilibrium population (at its carrying capacity), thousands of eggs and hundreds of tadpoles are produced by a single pair of frogs. On average, about how many offspring per pair will live to reproduce the next year? a. more than 100 b. 10 to 20 c. 0 d. 100 e. 2 |
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The species most at risk of extinction due to habitat destruction are those __________. a. with small, limited geographic ranges b. that photosynthesize c. with large, widespread geographic ranges d. at the lowest trophic levels e. with large numbers of individuals |
A |
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The Endangered Species Act aims to help protect species that ______. a. have suffered significant habitat destruction b. are in danger of extinction c. are non-native d. are economically valuable e. compete with invasive species |
B |
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Introduced species can have important effects on biological communities by ______. a. preying upon native species b. displacing native species c. competing with native species for resources d. reducing biodiversity e. doing all of the above |
E |
