Answer: D. Cancer
Cancer is when cells grow at an abnormal and uncontrolled rate.
Explanation:
Modern methods indicate that the mutation rate is roughly one to two mutation per 10,000 genes per generation.
The two types of succession are primary and secondary. <span> Primary succession is the series of changes that occur on an entirely new habitat which has never been colonized before, while secondary occurs on places that have already been colonized before.</span>