What does it mean to say that the energy of the electrons in an atom is quantized?.

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

heats surface water up

not too sure thinking all accelerations are pointed down

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).