Cardiovascular system, from my understanding.
Answer:
fission is the division of something or it can be called as the splitting of something
- intracellular space is absent
- Cells are oval, rounded or polygonal in shape.
Answer:
The atomic number
Explanation:
The number of protons in the nucleus of an atom is its atomic number
Hope it helps
B, proton is positive and it does not represent the symbol
