For giving you understanding ; we need Free O2 but Oxygen is also available in H20 right why dont we use it !!
As the early atmosphere was reducing as there was no free oxygen but it was later produced by chemoautotrophic bacteria !! Living thing release O2 in atmosphere thus making it oxidising in nature and then life evolves !!
The answer would be Waning Crescent :)
<span>The thing that might happen to the tree was it might get swept away by the current until it catches on something or disappears (dissolves). The tree will going to the flow of the river until it catches on something where it may disappears or dissolve.</span>
Answer:
Its chemical formula is C6 H12 O6,
Explanation:
I just counted the atoms for each element .
<span>A change in an organisms environment is called an?</span>
