Answer:
B. presence of oxygen in the atmosphere
Explanation:
I took the same test and got it right
<span>The correct answer is C. Cells produced when the mutant cell divides. What is being described here is basically how cancer is spread. A single cell is enough to get the mutation and become corrupt in order to create many many new cancer cells that will eventually kill the person if not treated. Some are easily treatable, some incurable.</span>
Out of the choices given, the step that caused an aerobic atmosphere during the history of Earth was the origin of photosynthetic prokaryotes. The correct answer will be D.
Answer:
a & c.
Explanation:
small local populations depend on a specific food source. If the food source is depleted because of the existing populus, chances are, there will be no reproduction. If the populus, does not look beyond their boundaries for food, the species will die.
