AP BIOLOGY

Detailed explanation-1: -Once pollen gets transferred to the stigma the male gametes from pollen grains release and fuse with the egg in the ovule to form a zygote. This process of fusion of gametes is called fertilization. The zygote thus formed, divides and develops into an embryo, and later into a seed.

Detailed explanation-2: -Introduction. High crop yield strongly depends on efficient formation of numerous ovules, which after successful fertilization, develop into seeds comprising seed coat, embryo, and endosperm.

Detailed explanation-3: -They’re contained within the fruit that grows from the fertilised ovary. Sexual reproduction produces seeds, which contain a young embryo capable of growing into a new plant.

Detailed explanation-4: -Seed development is initiated by fertilization, the union of a haploid male nucleus from the pollen grain with a haploid female nucleus within the ovule to form a new diploid organism.