It is called ecological succession, which can take up to a decade. It is a process of change in the species structure that occurs after a vast loss or extinction. Ecologists study how complexity is evident when a community is formed or occurrence takes place from an empty land or bare soil.
They might go extinct if they can't keep up with the competition
C i believe bc cancer is characterized by uncontrolled cell division
Stress is not a symptom of Gingivitis.
