D. nRNA... hope it helps :)
Answer:
the answer is A
Explanation:
the cell membrane is like a shield to the cell.
Answer:
Innate immunity you are born with.
Acquired immunity you need to work on over time
Explanation:
Poison ivy for example. Come people are born immune to it, while others have to be around it a lot, (agonizingly so), and they will build up immunity to it's poison.
Neutrons
The atomic mass is the weight of the protons and neutrons in the nucleus.
