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Guppies were moved from stream A, with a fish that preyed upon adult guppies, to stream B, with a fish that preyed upon juvenile guppies. After 30 to 60 generations, the guppies responded to the increased predation on juveniles relative to adults by

If survival rates do not vary with age, as in many species of perennial plants, reptiles, adult birds, and rodents, survivorship curves are typically

Water moves from regions of high water potential to regions of low water potential.

As the density of a population increases, the

The smallest particles occurring in soil are referred to as

A collection of natural bodies of earth, composed of mineral and organic matter and capable of supporting plant growth, is referred to as ________.

The carrying capacity is the population size at which dN/dt

The regulation of body temperature exclusively from the external environment is referred to as

Calculate the estimated population size, N, given a study that initially marked 100 animals and subsequently captured 50, of which 25 were marked.

Fecundity increases with body weight.