Answer:
D. the nucleus contains the protons and neutrons which takes up most of the mass of the atom
Explanation:
In frogs, different mating seasons are a barrier to reproduction.
Usually microorganisms help keep the nutrients in the soil cycling allowing for nutrients to be distributed all over. But they do what they can unless the disease is damaging to the soil itself therefore damaging the microorganisms working to keep the plant functioning.
I think True, sorry if i'm incorrect :(
