Why is traditional agriculture more energy efficient than high-tech agriculture?
a. Traditional agriculture uses high yield strains of crops.
b. Traditional agriculture relies on the muscle energy of humans and animals.
c. With traditional agricultural practices, more energy is used to produce fewer calories of food.
d. It is not; indigenous peoples merely think it is.
ANSWER:
b
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Most Homo erectus specimens have a sagittal keel running along the midline of the skull
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The probable ancestor of the gorilla, chimpanzee and bonobo lineages is __________
a. Ouranopithecus b. Dryopithecus c. Oreopithecus d. none of these