Answer:
D. the nucleus contains the protons and neutrons which takes up most of the mass of the atom
Explanation:
Different types of blood contact different kinds of antigens and antibodies. For example, Type A blood has A antigens and B antibodies, antibodies being the thing that fights B antigens. Type B blood has B antigens and A antibodies. So if someone with type B gets transfused with Type A blood, the person's antibodies will attack the new blood.
I don’t know dear keep trying
The answer is 4. Mitochondria
40% i believe. please correct me if i am wrong.