The answer is the cell membrane. The cell membrane controls what nutrients come in, and what unneeded material comes out. It protects the cell from anything that might come in and harm it. It is kind of like the security guard. A security guard let's the good people in and keeps the bad people out.
Answer:
c) absorption of water in the large intestines
Explanation:
Answer:
The first one and second one
Explanation:
Answer: B). 7
Explanation: The atomic number of an element is the number protons that are present in the nucleus of an atom of the element while the atomic mass of an element is the mass of its nucleus which is equal to the sum of protons and neutrons in the nucleus of the atom.
Atomic mass= number of protons + number of neutrons
Atomic mass of nitrogen= 14
Atomic number of nitrogen= number of protons= 7
Therefore, number of neutrons of nitrogen= 14-7
Number of neutrons = 7