A Keystone Species Is One

question 24

Multiple Choice

A keystone species is one

• A) that makes up a very large proportion of total community biomass.
• B) that feeds on a very large fraction of all available prey species.
• C) that is fed on by a very large fraction of all predators in its community.
• D) whose feeding activities have a disproportionate effect on the structure of its community.
• E) that occupies the lowest level (the base) of the food web.

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Definitions:

IUPAC Name

The systematic naming of chemical compounds according to the rules set by the International Union of Pure and Applied Chemistry.

Orbital

A region around the nucleus of an atom where there is a high probability of finding an electron.

Lone Pair Electrons

Pairs of valence electrons that are not shared with another atom and are localized on a single atom in a molecule.

Azeotropic Mixture

A mixture of two or more liquids that maintains its composition and boiling point during distillation, making it impossible to separate by distillation.