Answer:
Adaptation, in biology, the process by which a species becomes fitted to its environment; it is the result of natural selection's acting upon heritable variation over several generations.
Explanation:
An element is also a pure substance. The reason for this is because an element contains only one type of particle.
Option A is correct
Unregulated cell division can result in cancer
Number 4 here.click on the picture
thin walls.
a moist inner surface.
a huge combined surface area.
