Why is it significant that pollen contains a multicellular male gametophyte rather than just male gametes?
A. The non-gamete cells of the male gametophyte control the growth and development of the pollen tube.
B. The non-gamete cells of the male gametophyte provide nutrition that supports the development of the embryo.
C. The non-gamete cells of the male gametophyte undergo meiosis.
D. The non-gamete cells of the male gametophyte provide protection from desiccation and UV radiation.