Answer:
(B) Genes make up chromosomes.
Explanation:
Your answer is B.
Chlorine-the chemical element of atomic number 17, a toxic, irritant, pale green gas
atomic number-the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
Because we have smelled them so long we are used to them
Photosynthesis I think im not 100% sure beb