Which statement correctly describes the vegetative cell in a mature pollen grain?
The governing concept is pollen-grain development and cell differentiation. The vegetative, or tube, cell is usually larger and contains abundant cytoplasm and stored food; therefore option B is correct. These reserves support pollen-tube formation and growth through the style. The smaller generative cell divides to produce two male gametes. Both cells are haploid, so option D is incorrect, and option C describes the generative cell.