Life Science Review #7

Some beetles break down the remains of dead animals. Some mushrooms break down the remains of dead trees. How do these actions most benefit plants?

• By releasing oxygen to the air.

• By making space for new animals.

• By decreasing the population of herbivores.

• By returning nutrients to the soil.

Some facts about birds called cattle egrets are listed above.

Which of these facts best describes how these birds depend on other animals to survive?

• Fact 1

• Fact 2

• Fact 3

• Fact 4

A student observes the following activities while walking in a park.

Which of these living organisms was interacting with another living organism in the environment?

• Fire ant

• Blue jay

• Bee

• Hawk

Which of these describes one or more living organisms that depend on nonliving components?

• Bacteria living in the mouth of a horse.

• Ivy plants growing up a fence to obtain more sunlight.

• An angelfish eating shrimp.

• A bird nesting in a tree.

The food web above represents organisms in a field.

What role do raccoons play in this food web?

• Prey

• Producer

• Consumer

• Decomposer