It’s a term for molecules present in organisms that are essential to one or more typically biological processes, e.g. cell division.
Answer:
If you want to get it right put C
Explanation:
AP3X
For decades, scientists believed that the atmosphere of early Earth was highly reduced, meaning that oxygen was greatly limited. Such oxygen-poor conditions would have resulted in an atmosphere filled with noxious methane, carbon monoxide, hydrogen sulfide, and ammonia. As the Earth cooled down, most of the water vapour condensed and formed the oceans.
To date, there remain widely held theories and studies of how life on Earth may have been built out of this deadly atmosphere cocktail.
Explanation:
wipe dust and mucus ...........
The urinary system monitors and balances the Extracellular fluid in the body.
