In asexual reproduction, an organism inherits it's genetic material from a single parent. The new organism has the same genes as it's parent. In sexual reproduction, an organism inherits genetic material from two different parents. Sexual reproduction increases genetic diversity, whereas asexual reproduction does not. Plants, animals, and simple protists, can reproduce sexually or asexually. Mammals only reproduce sexually.
Pollen contains the male gamete. The pollen from one plant is transferred to the stigma of another plant of the same species. Stigma is the female part.
