Campbell Biology Chapter 38

The Blank______ of a species includes the resources and conditions required by a species plus the role it occupies in a community.

• population

• habitat

• niche

• phylogeny

The human intestinal tract is colonized with bacteria that consume resources and usually prevent other harmful bacteria from causing infections. This is an example of Blank______ among the bacteria.

• competitive exclusion

• resource partitioning

• subdividing a niche

• a climax community

Multiple species use the same resource in different ways or at different times in

• resource partitioning.

• logistic growth.

• competitive exclusion.

• exponential growth.

Counting the number of species in a habitat is a measure of

• net primary production.

• species succession.

• biomass.

• species richness.

If a biologist is measuring diversity by calculating the proportion of individuals of each species, he or she is actually calculating the ______ in the community.

• secondary succession pattern

• niche use (or habitat use)

• net primary production

• species evenness

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An organism's niche includes its habitat, its resource requirements, and its

• potential for gene flow.

• abundance.

• place in the food chain.

• evolutionary relationship to other species.

The concept that no two individuals can occupy the same niche at the same time indefinitely is the

• competitive exclusion principle.

• principle of parsimony.

• partitioning of resources.

• Hardy-Weinberg rule.

In resource partitioning, multiple species

• take part in a biogeochemical cycle.

• have the same niche.

• compete until all but one is eliminated.

• use the same resource but in different ways.

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An example of high species richness is

• the 15 individuals of large-mouth bass in a lake.

• the dominance of one species in an ecosystem.

• a community consisting of pioneer species.

• the 15 different fish species in a lake.

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What is a characteristic of a climax community?

• recently been disturbed

• remains fairly constant

• consists solely of pioneer species

• widespread in occurrence

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