Biology Chapter 5

The pattern of spacing between individuals across the range of a population is its

• growth rate.
• distribution.
• density.
• habitat.

There are 150 Saguaro cactus plants per square kilometer in a 10-square-kilometer area of Arizona desert. To which population characteristic does this information refer?

• growth rate
• geographic range
• age structure
• population density

If you know the range of a population, then you know

• the number of individuals that live in an area.
• the areas that are inhabited by the population.
• the birth rate and the death rate.
• the type of climate it lives in.

A small farming community in Texas covers 14 square kilometers. There are 420 individuals who live within the town limits. What is the population density of this community?

• 0.03 individuals per square kilometer
• 53 individuals per square kilometer
• 30 individuals per square kilometer
• 10.24 individuals per square kilometer

Which of the following gives you information about a population's age structure?

• There are 10 males and 15 females under the age of two.
• There are 25 individuals with a square kilometer.
• All individuals are found at least 10 meters away from others.
• Individuals live in rain forests in tropical South America.

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

• immigration
• death rate
• emigration
• demography

The movement of organisms into a range is called

• immigration.
• emigration.
• population shift.
• carrying capacity.

Which of the following could describe a population that is decreasing in size?

• The birthrate and the death rate remain the same.
• The death rate is becoming lower than the birthrate.
• The death rate is constant and the birthrate is increasing.
• The death rate is becoming higher than the birthrate.

If immigration and emigration numbers remain equal, which of these could cause a slowed growth rate?

• increased birthrate
• constant death rate
• decreased birthrate
• constant birthrate

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