<span>Preservation of advantageous genetic mutations, I think.</span>
I believe it is either B or A, personally i'm leaning towards B, but at the same time, i don't think that we would be obtaining materials via pollination, so it then causes A to make more sense.
Answer:
True
Explanation:
During contraction of skeletal muscle fibers, the thin filaments slide inward toward the A band's center as a result of cycles of crossbridge binding and bending.
RrTt ....means brown leaves and tall stems !
so answer is D !