The answer is blubber,<span>a special type of fat found in marine mammals that provides insulation? </span>
The stem cells divide through mitosis making two daughter cells. One daughter cell becomes a stem wall, and the other daughter cell differentiates into the tissue, so therefore stem cells maintain their populations because mitosis produces a daughter cell that differentiates, as well as one that self-renews, remaining a stem cell. Good luck, and hopefully this helps you out!
The answer is a)<span>
These regions are rich in plankton during summer
</span>