If most individuals in a population are young, why is the population likely to grow rapidly in the future?
a. Death rates will be low.
b. The population has a skewed age distribution.
c. Immigration and emigration can be ignored.
d. Many individuals will begin to reproduce soon.

In what populations does exponential growth tend to occur?

a. Populations that colonize new habitats

b. Populations that experience intense competition

c. Populations that experience high rates of predation

d. Populations that have surpassed their carrying capacity

Explain why a decrease in population growth rate is expected as a nonhuman population approaches carrying capacity.

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx has revealed that

a. Predation is the dominant factor affecting prey population cycling.

b. Hares and lynx are so mutually dependent that each species cannot survive without the other.

c. Both hare and lynx population sizes are affected mainly by abiotic factors.

d. The hare population is r-selected and the lynx population is K-selected.

After seeds have sprouted, gardeners often pull up some of the seedlings so that only a few grow to maturity. How does this practice help produce the best yield?

a. By increasing K

b. By decreasing r

c. By reducing intraspecific competition

d. By adding a density-independent factor to the environment

When individuals in a population are evenly spaced throughout their habitat, their dispersion is termed as__________:

a. Clumped

b. Uniform

c. Random

d. Excessive

e. Exponential

A population growing exponentially

a. Is stable in size

b. Adds a fixed number of individuals every generation

c. Adds a larger number of individuals in each successive generation

d. Will likely expand forever

e. Will not crash

Analyzing ecological footprints reveals that

a. Earth's carrying capacity would increase if per capita meat consumption increased.

b. Current demand by industrialized countries for resources is much smaller than the ecological footprint of those countries.

c. It is not possible for technological improvements to increase Earth's carrying capacity for humans.

d. The ecological footprint of the United States is large because per capita resource use is high.

To figure out the human population density of your community, you would need to know the number of people living there and

a. The land area in which they live

b. The birth rate of the population

c. The dispersion pattern of the population

d. The carrying capacity