7. Population ecologists are primarily interested in
(A) Understanding how biotic and abiotic factors influence the density, distribution, size, and
age structure of populations.
(B) The overall vitality of a population of organisms.
(C) How humans affect the size of wild populations of organisms.
(D) Studying interactions among populations of organisms that inhabit the same area.
(E) How populations evolve as natural selection acts on heritable variations among individuals
and changes in gene frequency.
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