The density and spacing of individuals within suitable habitat and the proportions of individuals in each age class comprise a population's __________. 

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#Question id: 12353

#Section 1: Ecology

The number of individuals per unit area determines the population's

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#Question id: 11181

#Section 2: Evolution

Among populations of birds, individuals without territories are

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#Question id: 10661

#Section 2: Evolution

Semelparous species are those that produce all of their offspring in a single reproductive event. The survivorship curve of a population of a semelparous species would most likely resemble which of the following? 

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#Question id: 3465

#Section 2: Evolution

One species lives only in tree holes; another species lives only in streams.

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#Question id: 3430

#Section 2: Evolution

The proximate causes of behavior are interactions with the environment, but behavior is ultimately shaped by