Ecosystems Review 1/12

Which is the most important effect of decomposers recycling dead plants and animals?

• The process prevents bad odors.

• The process adds nutrients to soil.

• The process removes objects from Earth.

• The process produces food for consumers.

Which of these organisms is considered a consumer?

• algae

• bird

• fungi

• tree

How is a deer in a forest ecosystem most similar to a rabbit in the same ecosystem?

• Both are decomposers.

• Both are consumers.

• Both are carnivores.

• Both are producers.

Which is a consumer that only eats producers?

• bird

• snail

• grass

• mushroom

Which organism is a producer?

• frog

• mushroom

• grass

• lizard

Which best describes the producers of an ecosystem?

• They provide food to herbivores.

• They provide food to decomposers.

• They provide hydrogen to the atmosphere.

• They provide carbon dioxide to the atmosphere.

How do decomposers recycle materials in nature?

• Decomposers create new material to be recycled.

• Decomposers break down the tissues of dead organisms.

• Decomposers are dead organisms to be eaten by producers.

• Decomposers produce bacteria and fungi as part of the recycling process.

Which type of organisms change dead material into nutrients for other animals to use?

• consumers

• decomposers

• herbivores

• producers

Which group of organisms are consumers?

• bacteria, fungi, and mushrooms

• cactus, fern, and maple tree

• deer, rabbit, and squirrel

• moss, protist, and algae

Which best describes the role of both mushrooms and worms in an ecosystem?

• They provide food for carnivores.

• They provide food for herbivores.

• They provide nutrients for the soil.

• They provide nutrients during photosynthesis.