Which of the following statements about tolerance range is true?a.Tolerance range is different for different organisms.b.The tolerance range is the total number of organisms that can be supported by an ecosystem.c.Tolerance range is affected by biotic factors in an ecosystem.d.The available water supply does not impact an organism’s tolerance range.
R-selected species have a short life span and an early reproduction cycle.
How does population density differ from population size?a.Population size takes all organisms into account, while population density only takes specific age groups of the population into account.b.Population size is the total number of organisms, while population density is the total number of organisms within a given area.c.Population size is the total number of organisms within a given area, while population density is the total number of organisms of a specific age.d.Population size is the total number of organisms of all species, while population density is the total number of organisms of a specific species.
When population growth increases in an area, what is happening to the birth rate and age structure of that population?a.increasing birth rate with a greater number of young organisms b.increasing birth rate with a smaller number of old organismsc.increasing birth rate with a smaller number of young organismsd.increasing birth rate with a greater number of old organisms
Which of the following statements is true?a.Biotic factors are nonliving components of an ecosystem.b.Abiotic factors are living components of an ecosystem.c.The available space in an ecosystem is an abiotic limiting factor.d.The available water supply in an ecosystem is a biotic limiting factor.
Which of the following is not a factor in determining population size?a.the food supplyb.birth ratec.available nichesd.detritivore activity
Which of the following statements about population distribution is not true?a.Population distribution can be even, clumped, or random.b.Population distribution applies only to animals.c.A population distribution shows where organisms are located. d.A population distribution shows the arrangement of organisms in a location.
When two species compete for the same ecological niche, they cannot coexist because they are competing for the exact same resources. One species is always slightly better adapted for the niche than the other, so over time the disadvantaged species will either go extinct or shift to a different ecological niche. This situation highlights the concept of _______.a.carrying capacityb.competitive exclusion c.limiting factord.biotic factor
In a particular environment there is plenty of food, water, cover, and space to support a large population of pheasants, but a larger quantity of predators are introduced. The predators become the _______ for pheasants in that environment.a.carrying capacityb.abiotic factorc.limiting factord.biotic factor
Which of the following is an example of an even population distribution?a.corn planted in a fieldb.flocks of birdsc.people in a parkd.deer in a forest
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