Ecology Test Review

Where would secondary succession most likely happen?

• a rock ledge exposed by a melting glacier

• an area with a healthy ecosystem

• an area that was affected by forest fire

• lava flow

Which best explains energy flow in a food energy pyramid?

• 90% of the energy is gained going from insects to birds

• 100% of the energy is maintained as you move upwards

• 10% of energy is lost as you go from insects to birds

• 90% of energy is lost as you go from insects to birds

The clown fish and anemone live together in a symbiotic relationship. The clownfish scares off anemone predators and the anemone provides the clownfish a home. What type of relationship is this?

• predation

• parasitism

• commensalism

• mutualism

Plants use nitrogen to make proteins. What is present in the soil that makes nitrogen available to plants?

• bacteria

• sugar

• air

• fire

Which is a biotic factor that affects the size of a population in an ecosystem?

• concentration of oxygen

• number of predators

• temperature

• type of soil

Which is LEAST likely to be affected by a density-dependent limiting factor?

• population with high birth rates

• population with high immigration rate

• large, dense population

• small, scattered population

What is the most probable hypothesis after primary succession due to a volcanic eruption?

• squirrels will be the pioneer species

• maple trees will be the pioneer species

• lichens will be the pioneer species

• nesting birds will colonize it first

In which form is carbon passed from animals to plants?

• none of these

• carbon dioxide

• oxygen

• fossil fuels

Why is a relationship between a human and a tapeworm considered parasitism?

• Neither is harmed

• Both the human and the tapeworm benefit

• The human benefits but the tapeworm is harmed

• The tapeworm benefits but the human is harmed

What is the trophic level directly ABOVE producers called?

• primary consumers

• secondary consumers

• tertiary consumers

• apex predator