Answer:
I would say D.
Their conclusion only applies up until the 3rd plant, after that it seems to harm the growth.
Layer c is the oldest and then it’s b and a
male gametes that contribute genetic information (DNA) but few or no nutrients to the offspring. the nuclei of the egg and one sperm unite to form the zygote; the other sperm nucleus fuses with the two polar nuclei, forming a triploid (3n) cell. so, a, I believe.
hope I helped!
The object's mass. Weight would be how gravity affected it, size is how large it is, density is how tightly the molecules are to each other. Mass is how much matter is in the object.