Ecology Review & Learning Guide

Which of the following would be the definition of a detritivore?

• Animals that eat insects.
• Organisms that feed on rocks, recycling the nutrients back into the ground.
• Organisms that eat only pants
• Things that feed on dead organisms, recycling the nutrients back into the ground.

What are living portions of the ecosystem called?

• Biotic factors
• Abiotic factors

A collection of organisms that belong to DIFFERENT populations but all live in the SAME area and interact with one another is called a...

• Population
• Ecosystem
• Community
• Ecosphere

A collection of organisms that make up a community as well as all of the nonliving aspects of the environment is called an...

• Population
• Community
• Habitat
• Ecosystem

Imagine a "pyramid of energy" in your head.  What do you call an organism found at the second trophic level?

• Top carnivore
• Producer
• Herbivore
• Carnivore

What do you call two or more members of a particular species living and interacting in the same area?

• Community
• Population
• Organisms
• Biosphere

The ARROWS in a food chain or food web represent __________

• competition between species.
• the relationships in a ecosystem.
• how energy flows through an ecosystem.
• mutualistic relationships between species.

What might happen if you remove a primary consumer from an ecosystem?

• There would be more food for secondary consumers.
• The number of primary consumers would increase.
• The number of producers would increase.
• The number of secondary consumers would increase.

A tick and a dog have this type of relationship.

• mutualism
• commensalism
• neutralism
• parasitism

How many primary consumers are there in this food web? (HINT: find the producer first!  Not always at bottom of web.  Click on picture to make it larger.)

• 1
• 2
• 3
• 4