Ecosystems (5.9 A/B)

A zookeeper sets up a habitat for a certain species of rabbit. Which of the following describes an interaction between the rabbit and two nonliving parts of its habitat?

• The rabbit breathing air and running around on the rocks.

• The rabbit licking its fur and feeding its babies.

• The rabbit hiding under plants from predators.

• The rabbit nibbling on vegetation and drinking water.

A student observed and recorded some activities in an aquarium.

An interaction between two living parts of the environment is represented by-

• Observations 1 and 2

• Observation 3

• Observations 4 and 5

• Observation 6

Which of these describes one or more living organisms that depend on another living organism to survive?

• Bacteria living in the mouth of a horse.

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

• Mold living on a hard, rocky surface.

• An angelfish releasing carbon dioxide into pond water.

Green plants are producers that begin the flow of energy between organisms in a food web when they–

• reproduce by generating seeds.

• absorb water and nutrients from soil.

• release oxygen into the atmosphere.

• make their own food using sunlight.

Mold, fungi, and some types of bacteria are classified as decomposers. What is the role of a decomposer in a food web?

• To break down organic wastes and dead organisms

• To use sunlight and water to produce their own food

• To release oxygen into the atmosphere for respiration

• To provide the energy animals need for food

The diagram shows a pond food web. What two organisms get their energy directly from insect larvae?

• Algae and minnows

• Sunfish and bass

• Minnows and sunfish

• Snails and snapper turtles

The diagram shows a woodlands food chain. What is the role of the tree in the food chain?

Sun -----> Tree -----> Squirrel-----> Hawk

• To make energy available directly to the hawk

• To use the sun’s energy to produce food

• To break down waste products left by squirrels

• To provide a place for the hawk to build its nest

The prairie food web illustrated here has producers and consumers. In this food web, how many more consumers than producers are there?

• 2

• 5

• 7

• 9