How Ecosystems Work

What is the ultimate source of energy for almost all organisms?

• consumers

• the sun

• producers

• bacteria

Which of the following are two types of consumers?

• grass and cow

• rabbit and coyote

• photosynthesizing protist and sheep

• fungi and trees

What is a diagram showing the many feeding relationships that are in an ecosystem?

• food chain

• food web

• trophic levels

• energy pyramid

What is the process in which energy from the sun is used by plants to make sugar molecules?

• glucose synthesis

• cellular respiration

• photosynthesis

• ribose metabolism

What are the two products of photosynthesis?

• carbon dioxide and water

• water and glucose

• oxygen and glucose

• oxygen and carbon dioxide

What illustrates the loss of energy from one trophic level to the next?

• food web

• food chain

• trophic levels

• energy pyramid

What are organisms that get their energy by eating other organisms?

• producers

• consumers

• decomposers

• autotrophs

Which of the following is a carbon reserve made from the remains of plants and animals that died a long time ago?

• coal

• natural gas

• petroleum

• All of these are carbon reserves made from the remains of plants and animals that died a long time ago.

What is an organism that makes its own food?

• producer

• autotroph

• consumer

• heterotroph

• both producer and autotroph

Which term describes the change that occurs on abandoned farmland?

• primary succession

• old field succession

• secondary succession

• tertiary succession