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Chemistry, 01.09.2019 21:30 StephenCurry34
Manned missions into the far reaches of outer space could require astronauts to be in weightless environments for years at-a-time. which of these is an effect of prolonged weightlessness on the human body?
a.
a stronger heart
b.
a loss of bone mass
c.
a weaker immune system
d.
a lack of sleep
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