Answer: bone marrow and thymus
Explanation: its right.
Answer:
D: They have restricted cell division.
Explanation:
Pre cancerous cells often act like cancer cells and will grow at abnormal rates but unlike cancer cells they are unable to invade other organs
The atomic number of hydrogen is 1 (count the protons). The atomic mass number of hydrogen is also one (there are no neutrons!). For carbon, the atomic number is 6, and the atomic mass number is 12 (6 protons plus 6 neutrons). Adding the two neutrons changes our atom.
Yes. neruron pathway single to other nervous system