Unit 6 Review

The human population is increasing every day. How does this increase in population affect the natural resources that maintain humans?

• It increases the supply of resources.

• It decreases the supply of resources.

• It results in less demand for resources.

• It improves the quality of the resources.

How could the introduction of a nonnative species of plant affect an ecosystem in North Carolina?

• It could pollinate the native plant species, producing a disease-resistant species

• It could reduce the competition for space and light with native plant species

• It could take over the habitats of the native plant species.

• It could cause some insect species to destroy native plant species.

Why is it important to conserve the biodiversity of Earth?

• to decrease the amount of global predator populations

• to decrease the stability of major global ocean currents

• to provide resources for humans

• to increase the amount of nonrenewable resources located in the lithosphere

Which is a biotic factor that could affect an ecosystem?

• dust storms moving through an ecosystem

• bacteria harming the health of organisms in an ecosystem

• large amounts of acid rain precipitation seeping into the soil in an ecosystem

• high levels of carbon dioxide entering the atmosphere within an ecosystem

What will most likely happen to a stable ecosystem when a population of animals exceeds the ecosystem’s carrying capacity?

• The ecosystem will improve.

• The animals will not have enough resources for survival.

• The ecosystem will change type.

• The ecosystem will remain unchanged.

A plant or animal species that is not native to a specific location and has a tendency to disrupt the ecosystem

• native species

• invasive species

• abiotic organisms

• pioneer species

Which of the following terms is the least encompassing (or the most specific term) in the ecological organization hierarchy?

• species

• biosphere

• community

• population

What will most likely happen if the human population continues to grow at current rates?

• There will be fewer natural resources available for future generations.

• There will be an increase in nitrogen levels in the atmosphere

• There will be a decrease in water pollution

• There will be an increase in the number of strong hurricanes

Which example describes an abiotic factor that could impact the diversity of an ecosystem?

• An increase in prey can impact the number of predators in an ecosystem.

• The introduction of an invasive species can change the amount of available resources

• An increase in the amount of acid rain can change the pH of the soil

• The competition for food can impact the survival rate between members of the same species

Over the years, scientists found that kudzu creates problems by growing rapidly and preventing other plants from getting sunlight. Which best describes kudzu?

• a noncompetitive species

• an invasive, nonnative species

• an agent of erosion

• an abiotic factor