1. Which of the following does not represent a population?

A. all the birds in Chicago, Illinois
B. all the robins in Austin, Texas
C. all the grass frogs in a pond in Central Park, New York City
D. all the black bears in Yosemite National Park

2. Which of the following may help stabilize an ecosystem? *

A. severe weather
B. invasive species
C. low biodiversity
D. high biodiversity

3. Which of the following is a density-independent factor? *

A. predators
B. water
C. food
D. hurricanes

4. Carrying capacity is the

A. largest population an environment can support at any given time.
B. the maximum number of offspring a female can support at one time.
C. the amount of evolutionary change that is possible in a species.
D. the number of competitors in a population at one time.

5. In a population where most members are of reproductive age, which is a reasonable prediction if there are plenty of resources? *

A. The population is growing exponentially.
B. The population is growing logistically.
C. The population has no carrying capacity.
D. The population will keep growing indefinitely.

Referring to the graph in the attachment, between what years does this graph predict that the human population growth rate will start slowing?


According to the graph also in the attachment, what will the world human population be in 2050?