Unit 2.6-Feeding Relationships

Multiple Choice

Which of the following best describes how energy flows through an ecosystem?

• Energy flows in one direction from the sun to producers and then to consumers and decomposers.

• Energy cycles back and forth between producers and consumers only.

• Energy is created by consumers and passed to producers.

• Energy remains constant and does not change form in an ecosystem.

Fill in the Blanks

Organisms that depend on autotrophs for energy are called

.

Multiple Choice

Which of the following best describes the role of decomposers in an ecosystem?

• They obtain energy from the sun or chemical compounds.

• They eat animals that have already died.

• They break down dead and decaying matter into simpler molecules.

• They eat both plants and meat.

Multiple Choice

In the energy flow diagram, which organism receives energy directly from the sun?

• Plant

• Primary Consumer

• Secondary Consumer

• Decomposer

Multiple Select

Which of the following statements about food chains and food webs are correct?

• Food chains show the feeding relationships of organisms.

• Food webs show many overlapping food chains.

• Arrows in food chains show the transfer of energy.

• Food webs only show one type of food source for each organism.

Multiple Choice

Which group of organisms can be found at every point in a food web if an organism dies?

• Herbivores

• Producers

• Decomposers and scavengers

• Primary consumers