Unlike Prokaryotic cells, eukaryotic cells can actually have different roles instead of the same cell over and over. This, obviously, leads to more complex creatures. Basically, a theory (now proven correct) called The Big Gulp explains how we took in small prokaryotic organisms to do the roles for us. For example, mitochondria makes proteins so we do not have to waste our own organisms protein.
A reaction is when you get a surprise and a reflex is when you get flashbacks really fast
It involves an exchange of carbon as Plants and Animals remove carbon from the atmosphere by various activities. At the same time, they add carbon back to the atmosphere by various activities.
The answer would be C.mountains
