Ch 5 - How Ecosystems Work

Because plants and algae make their own food they are known as

• decomposers
• heterotrophs
• autotrophs
• consumers

Which of the following organisms is considered to be an herbivore?

• bear

• wolf

• elk

• vulture

The following are products of cellular respiration

• carbon dioxide, glucose
• oxygen, glucose, energy
• carbon dioxide, water, energy
• oxygen, energy

Which of the following is an example of a decomposer?

• flower
• bee
• human
• bacteria

Each time energy is transferred from one trophic level to the next, how much energy is lost as heat?

• 10%
• 30%
• 70%
• 90%

The rabbit 

• is a primary consumer
• is a secondary consumer
• is a tertiary consumer
• is a quaternary consumer

Which of the following received their energy directly from the sun?

• producers
• consumers
• decomposers
• scavengers

Which term is used to refer to the many feeding relationships that are possible in an ecosystem?

• energy pyramid
• food web
• food chain
• energy transfer

Photosynthesis and cellular respiration are both associated with which of the following cycles?

• sulfur cycle
• carbon cycle
• nitrogen cycle
• phosphorus cycle

When fossil fuels are burned, what gas is released into the atmosphere?

• atmospheric nitrogen

• oxygen

• carbon dioxide

• sulfur dioxide