The Population Densities of Skunks in Western Massachusetts Vary Considerably

question 14

Multiple Choice

The population densities of skunks in western Massachusetts vary considerably from year to year;therefore,skunk density is

• A) at equilibrium.
• B) density dependent.
• C) dynamic.
• D) a metapopulation.
• E) at carrying capacity.

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Definitions:

Chorion

The outermost membrane surrounding an embryo in mammals, birds, and reptiles, contributing to the formation of the placenta in mammals.

Allantois

An extraembryonic membrane of reptiles, birds, and mammals that stores the embryo’s nitrogenous wastes; most of the allantois is detached at hatching or birth.

Nitrogenous Wastes

Metabolic waste compounds that contain nitrogen, commonly produced by the breakdown of proteins and nucleic acids in organisms.

Umbilical Cord

A flexible cord-like structure containing blood vessels, connecting the fetus to the placenta during pregnancy.