How did NASA help to distinguish genetic factors from environmental ones when studying the effects of living space? (1 point)
• By analyzing changes in one twin on Earth and the other in space.
• By running experiments on astronauts that were in space for over a year.
• By observing changes in retired astronauts over a period of ten years.
• By introducing animals and other organisms that could be studied in space.
1 answer
By analyzing changes in one twin on Earth and the other in space.