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 a 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

Carbon is NOT a component of which of the following?

• carbohydrates
• proteins
• fats
• nucleic acids

Which of the following is one of the largest carbon sinks?

• carbon dioxide in the atmosphere
• calcium carbonate in coral reefs
• carbon stored in limestone at bottom of ocean
• carbon stored in humans