The nucleus of atoms are comprised of protons and neutrons.
If you are talking about frequency in terms of waves, it is in seconds^-1
Chromosomes is the answer I think
Answer:
Acid
Explanation:
Because water is neutral and has a pH level of 7, and anything below 7 on a pH scale is acidic, solute X is an acid because it lowered the pH level.
Your answer is <span>c. cell wall.
Hope this helps :)</span>