Biology Chapter 5 Test

Front

What happens to the population size when it is unchanged?

Back

Population size is unchanged.

Front

What does the carrying capacity represent in logistic growth?

Back

The maximum number of organisms an environment can support.

Front

What is the relationship between populations of herbivores and plants?

Back

They cycle up and down like populations of predators and prey.

Front

What can limiting factors lead to in terms of resources?

Back

Resource scarcity, causing extinction.

Front

What are density-dependent limiting factors?

Back

Factors that operate strongly when population density reaches a certain level.

Front

Define carrying capacity.

Back

The maximum population size that an environment can sustain indefinitely.

Front

What is logistic growth?

Back

A model of population growth that levels off as population size approaches carrying capacity.

Front

What are density-independent limiting factors?

Back

Factors that affect population size regardless of the population's density.

Front

Give an example of a density-dependent factor.

Back

Competition for resources, predation, disease.

Front

Give an example of a density-independent factor.

Back

Natural disasters, climate changes.