Answer:
It helps the body regain iron from the blood loss that occurs during a surgery. Hope this helps :)
It was plants maintained photothenysis . global oxygen increase very important.but natural do it
Gizmono
NASA reignited our hopes of finding alien life when it announced the first direct evidence of liquid water on Mars. But before we start indulging in fantasies of space crabs and reptilian beings, we ought to remember that Mars is a frigid world with a thin atmosphere. And that raises an obvious question: What sorts of life forms could actually live there?
Any life on Mars today is almost certainly microbial, but beyond that, we can’t be sure of anything until we actually dig it up and study it. Still, we can make some educated guesses about the nature of Martian life, by taking a deep dive into some of the weirdest biology on planet
Answer: D
They often occur spontaneously, because when energy is released during a chemical reaction it does not usually happen slowly.
I believe it’s your answer is c