The pollen grain is responsible for the production and delivery of sperm cells to the female
gametes in flowering plants. Early in pollen development, there is an asymmetric division …

Plant cells are surrounded by the plant cell wall, which defines the plant cell shape as well
as provides structural integrity to plant tissues and organs. Among the various classes of …

In flowering plants, the male gametophyte produces a pair of functional sperm cells that are
transported to the embryo sac for double fertilisation. Asymmetric division of the microspore …

In plants, each male meiotic product undergoes mitosis, and then one of the resulting cells
divides again, yielding a threecelled pollen grain comprised of a vegetative cell and two …

Endosperm supports the development of embryos and thus, is crucial for the life cycle and
reproductive success of flowering plants. In addition, the endosperm of especially grass …