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How did NASA help to distinguish genetic factors from environmental ones when studying the effects of living space? (1 point)
O By introducing animals and other organisms that could be studied in space.
By observing changes in retired astronauts over a period of ten years.
O By analyzing changes in one twin on Earth and the other in space.
O By running experiments on astronauts that were in space for over a year.
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Answered by
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By analyzing changes in one twin on Earth and the other in space.
Explanation: Studying identical twins (Scott in space, Mark on Earth) allowed researchers to control for genetics and attribute differences to the space environment.
Explanation: Studying identical twins (Scott in space, Mark on Earth) allowed researchers to control for genetics and attribute differences to the space environment.
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