Ecosystems EOG Review

What happens to a population and to competition when there is a reduction of living space?

• The population expands and competition intensifies.

• Competition strengthens while the population contracts.

• The population increases as competition decreases.

• Competition weakens and the population decreases.

Kudzu vines grow by climbing and wrapping around trees. Trees covered by kudzu can die because they are starved of sunlight. What type of relationship exists between the trees and the kudzu growing on them?

• competition

• mutualism

• parasitism

• predator-prey

Which of these organisms is a producer in a marine ecosystem?

• fish

• gull

• algae

• worm

Which best determines the number of wolves that can live in an area?

• the amount of snow in the area each year

• the number of birds hat live in the area

• the number of trees in the area

• the amount of food available in the area

Where is the largest amount of energy found in this web?

• hawk

• grass

• mouse

• grasshopper

If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?

• The population of deer will increase.

• The population of deer will decrease

• The population of deer will remain the same

• The population of deer will become extinct

Where do plants get most of the energy they need to live and grow?

• water

• soil

• air

• sunlight

In a food pyramid, which best explains why the number of organisms decreases from one trophic level to the next?

• Consumers at the lower level require more energy than the top-level consumers.

• Consumers at the top level require more energy than the lower-level consumers.

• The consumers are feeding on larger organisms that have less energy.

• The consumers are feeding on smaller organisms that have less energy.

How are mutualism and parasitism different?

• Both organisms benefit in mutualism, while in parasitism only one organism benefits at the other’s expense.

• Both organisms benefit in parasitism, while in mutualism only one organism benefits at the other’s expense.

• Both organisms benefit in mutualism, while in parasitism one organism benefits, and the other is neither harmed nor benefits.

• Both organisms benefit in parasitism, while in mutualism one organism benefits, and the other is neither harmed nor benefits.

The table shows the food choices for two species of birds.

Which will most likely happen to Questors as a result of Wood Plaxers migrating to their habitat?

• The Questors will compete with the Wood Plaxers for food resources.

• The Questors will be forced to fly to a different habitat.

• The two species will become extinct.

• The two species will coexist with no competition.