Chapter 5 Review

There are 150 Saguaro cacti plants per square kilometer in a certain area of Arizona desert. To which population characteristic does this information refer?

• growth rate

• geographic distribution

• age structure

• population density

What can cause a population to grow?

• The birthrate becomes higher than the death rate.

• The birthrate stays the same, and the death rate increases.

• The birthrate becomes lower than the death rate.

• The birthrate and the death rate remain the same.

When individuals in a population reproduce at a constant rate, it produces a growth pattern called

• logistic growth

• growth density

• demographic growth

• exponential growth

Which are two ways a population can decrease in size?

• immigration and emigration

• increased death rate and immigration

• decreased birthrate and emigration

• emigration and increased birthrate

As resources in a population become less available, population growth

• becomes negative

• increases slowly

• reaches carrying capacity

• enters a phase of exponential growth

Which of the following is NOT likely to be a limiting factor on the sea otter population?

• disease

• competition

• drought

• predation

Which will reduce competition within a species' population?

• fewer individuals

• higher birthrate

• fewer resources

• higher population density

If a population grows larger than the carrying capacity of the environment, the

• death rate may rise

• birthrate may rise

• population will grow faster

• carrying capacity will change

Which of the following is NOT one of the factors that play a role in population growth rate?

• immigration

• death rate

• emigration

• demography

One of the main characteristics of a population is its

• change over time.

• geographic distribution.

• dynamics.

• habitat.