Out of all the choises
a. cells are the building blocks of life
b. cells all arise from pre existing cells
<span>c. cells are the basic living units of structure an function </span>
<span>d. all of above
</span>it would be d
All of the following are a source of carbon in the carbon cycle except the sun
I believe the answers are:
-Favors organisms well adapted to the environment.
-Is often called survival of the fittest.