Chapter 3 Lesson 3 Quiz

Refer to the illustration. How much energy is available to the organisms in level C? Choose the correct answer.

5-20 percent of the energy in level B

Each level in a food chain contains less energy than the one below it because some energy is __________. Choose the correct answer.

lost as heat

Which of these can be both primary and secondary consumers? Choose the correct answer.

omnivores

Which provides most of the energy in ecosystems? Choose the correct answer.

producers

From which source do almost all producers obtain their energy? Choose the correct answer.

sunlight

Which description fits with the term biomass? Choose the correct answer.

the mass of the living and dead organisms in a given area

Which does a pyramid of numbers display? Choose the correct answer.

the number of organisms in an ecosystem

The diagram shows an oceanic food web. At what trophic level do the killer whales primarily feed? Choose the correct answer.

the third and fourth trophic levels

When a giraffe eats leaves from a tree, it incorporates the leaves into its own __________. Choose the correct answer.

biomass

Leopard seals eat only meat. What are leopard seals? Choose the correct answer.

carnivores