Question

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.

Answer 1

c) by analyzing changes in one twin on earth and the other in space.