Population Ecology (Review)

Front

The most basic level of ecological organization is a(n) __________.

Back

individual

Front

The study of living and nonliving components of a system can best be described as a(n) __________.

Back

ecosystem ecology

Front

Habitats provide organisms with the ________ they need to live, such as food, shelter, breeding sites, and mates.

Back

resources

Front

What is the main difference between an ecosystem and a habitat?

Back

An ecosystem is a community of living organisms and their physical environment, while a habitat is the natural environment in which a specific organism lives.

Front

When a population size ________________ or remains steady, this is often a sign of a healthy population.

Back

increases

Front

If a population size begins to ________________ rapidly, this can be a signal that extinction is coming.

Back

decrease

Front

Instead of counting each organism individually, ecologists use ________________ methods to estimate population sizes.

Back

sampling

Front

A population’s density describes how ________________.

Back

crowded the population is.

Front

What information is used along with population size to calculate population density?

Back

area

Front

Which type of population distribution is found most often in nature?

Back

Clumped