Ovule: In seed plants, a protective structure in which the female gametophyte develops, fertilization occurs, and seeds develop; contained within the ovary. Structures inside the ovary of the flower within which the female gametophyte develops after megasporogenesis has produced a megaspore inside each ovule.

 

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Ovule: In seed plants, a protective structure in which the female gametophyte develops, fertilization occurs, and seeds develop; contained within the ovary. Structures inside the ovary of the flowe . . . View Full Definition

Seed Coat: The tough outer layer of the seed, derived from the outer layers of the ovule.

Tube Nucleus: One of the cells in the male gametophyte in seed plants. The tube nucleus grows through the stigma, style, and into the ovule, clearing the way for the sperm nuclei to enter the embryo sac.

Ovaries: 1) In animals, the female gonads, which produce eggs (ova) and female sex hormones. 2) In fiowers, part of the female reproductive structure in the carpel; contain the ovules, where egg deve . . . View Full Definition