Ecosystems: CA3 Review

Sunlight - Grass- Ant -Lizard - Snake

Which of the following is a consumer in the food chain shown above?

• snake

• sunlight

• grass

• all of these

Which of the following is true?

• A producer must be a plant.

• A producer usually gets food by hunting other organisms.

• A person that prepares his/her own meals is a producer.

• Consumers depend upon producers for food.

The picture shows the flow of energy through a food web.

Which of the following describes a path of energy flow through this food web?

• wolf → plant → deer

• plant → hare → deer

• plant → hare → cougar

• cougar → hare → wolf

Which of the following correctly describes one way that energy flows in this food chain?

• Grasshoppers get energy directly from herons.

• Grasshoppers get energy directly from frogs.

• Frogs get energy directly from grasshoppers.

• Frogs get energy directly from herons.

Which of the following is true of consumers? Select all that apply.

• Consumers cannot make their own food.

• Some consumers can use producers as food.

• Some consumers can use other consumers as food.

The Sun provides energy. Plants use the energy to make food. How do animals get energy?

• Animals do not need energy.

• Animals absorb the Sun's energy and make their own food.

• All animals get energy by hibernating.

• Animals get energy by eating the plants.

In an ecosystem, organisms can be divided into producers and consumers. Producers are organisms that use sunlight directly to make food. Consumers are organisms that eat producers or other consumers.

Which organism(s) in this food chain is a consumer?

• the herring, salmon, and whale

• the whale and salmon only

• the whale only

• the phytoplankton only

What is the role of the marsh grass in the food chain shown?

• producer

• consumer

• decomposer

• beginning source of energy in food chain

How do decomposers help an ecosystem? Select all that apply.

• Decomposers keep dead matter from "piling up" in an ecosystem.

• Decomposers restore essential nutrients to an ecosystem.

• Decomposers use sunlight to make food for an ecosystem.

All life on Earth receives energy from plants. How do plants receive energy?

• from dead insects

• from the Sun

• from water only

• from pollination