Biologists have catalogued all the species on earth, except for a few rare species in remote tropical areas.

a. true
b. false


Ans: b. false

Biology & Microbiology

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What is the name for an association of fish that exhibit behaviors for social reasons?

a. Synchronization b. Shoaling c. Catadromous d. Anadromous

Biology & Microbiology

An ecologist samples the abundance of various species along an environmental gradient and fails to find clusters of species. Instead, peaks of abundance of dominant species are merely randomly spaced segments along a continuum

This distribution of species supports the A) unified concept of a community. B) organismic concept of a community. C) individualistic or continuum concept of a community. D) successional concept of a community.

Biology & Microbiology

Probable factors that affect the passage of materials across cell membranes include all of the following except ____________.

a. concentration b. size c. color d. charge

Biology & Microbiology

When you look at the spacing of humans on a global level, what type of distribution does the population follow?

A) clumped B) uniform C) random D) indescribable

Biology & Microbiology