D. Electrons because isotopes deal with electrons.
Answer:
To maintain homeostasis, unicellular organisms grow, respond to the environment, transform energy, and reproduce. The cells of multicellular organisms become specialized for particular tasks and communicate with one another to maintain homeostasis. ... Active transport requires energy.
The name of the biggest part of the human brain is CEREBRUM.........
(C) the cell cycle is important and cell division divides the cell.