BIO: Chapter 5- Population Ecology

How do ecologists study populations?

• geographic range

• density and distribution

• growth rate

• age structure

• all or correct

A population is a:

• group of organisms of more than one species that live in a given area

• group of organisms of a single species that lives in a given area

• group of biotic and abiotic factors in an ecosystem

• a group of biomes

The area inhabited by a population is called its

• growth rate

• age structure

• density and distribution

• geographic range

Population density refers to:

• the number of individuals per unit area

• the number of individuals in a population

• the number of biotic factors in an ecosystem

• the birth rate

The far left population distribution shown is:

• random

• uniform

• clumped

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The far right population distribution is best described as:

• random

• uniform

• clumped

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A population’s ___________ determines whether the population size increases, decreases, or stays the same.

• birth rate

• growth rate

• death rate

• logistic curve

To fully understand a plant or animal population, researchers need to know the population’s _____________—the number of males and females of each age a population contains.

• density and distribution

• survivorship curve

• birth rate

• age structure

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The factors that can affect population size are

• birth rate

• death rate

• rate at which individuals enter or leave the population

• all answers are correct

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A population can ________ when its birth rate is higher than its death rate.

• shrink

• stay constant

• grow

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