Herd animals are usually concentrated in the __________ biome.

The great northern coniferous forests are part of the ______ biome.

The range of factors under which an organism functions and survives is known as __________.

The colonization of new sites by communities of organisms is ___________ succession.

The region of the ocean shallow enough for sunlight to penetrate is the ________ zone.

The stable ecosystem that develops due to succession _____.

The first organisms to appear in an area undergoing succession are known as ____________________.

The effect of movement of people between counties has _____ effect on total world population.

Bacteria employ a(n) _____ reproductive strategy, a characteristic determined by their small size, rapid maturation, and short life span.

A population that grows until it reaches its carrying capacity usually has the shape of an _____.

Density-independent factors are limiting factors whose effects are _____.

Unrestricted populations of organisms experience _____.

When you study all the growth characteristics of a human population, you are studying its _____.

The major threat to biodiversity is _____.

Acid rain changes the pH of soil, killing some trees. This is an example of _____.

The number of species in an area is a measure of ____________.

A species that is brought to a place where it never lived is considered a(n) _______species.

A conservation biologist's main concern is protecting __________.

When roads cut across natural areas, this produces habitat _____________.

A plot of protected land may have different conditions at the edges than in the middle. This is known as _______ effect.

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