how did NASA help to distinguish genetic factors from environmental ones when studying the effects of living space?
a ) by observing changes in retired astronauts over a period of ten years.
b ) by introducing animals and other organisms that could be studied in space.
c ) by analyzing changes in one twin on earth and the other in space.
d ) by running experiments on astronauts thats were in space for over a year.
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c) by analyzing changes in one twin on earth and the other in space.
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