People who live in poor countries have diets that are made up primarily of plant materials. This is because 

A. plant foods are less expensive than are animal foods.
B. many calories would be lost if they fed plants to animals.
C. more people can be supported at the herbivore level than at the carnivore level.
D. All of these answers are true.


D. All of these answers are true.

Biology & Microbiology

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What did researchers find is a profit motive that can be applied to solve the fisheries crisis?

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