Answer quick
what is one way space travel affects the human body?
a) too much blood flows into the upper body.
b) the heart pumps harder with less gravity.
c) too little blood flows into the upper body.
d) the legs get stronger.

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.