Test: AP Biology

1.

A certain grassland ecosystem consists of grasses that grow on the plains, mice that eat the grains the grasses produce, weasels that eat both the grass and the mice, and hawks that eat the weasels.

Which of these species will account for the smallest proportion of the biomass of this ecosystem?

The grass

The bacteria in the soil

The weasels

The hawks

The mice

1/50 questions

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