CAST 8

Posljednje ažuriranje 21 days ago

Students are studying ecosystems. Their teacher assigned groups to make posters that show how matter and energy flow through a food chain. One group drew this model.

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Which would be the best choice to fill the empty box and complete the model?

A. a mouse that eats matter in the form of seeds produced by grass

B. a tree that makes its own matter using sunlight, carbon dioxide, and water

C. microbes that break down dead organisms, releasing their matter to be reused in the food chain

D. a chicken farmer that scares away a hawk to keep it from eating matter in the form of his chickens.