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Unformatted text preview: zygote becomes the new plant embryo. Another sperm cell fuses with two other cells in the female gametophyte to produce a triploid (three sets of chromosomes) endosperm nucleus, which develops into the endosperm that will feed the growing embryo. The ovule becomes the seed in which the embryo develops, and the ovary ripens into a fruit. During plant development, the cells become more specialized. In angiosperms, the embryo remains dormant for a while. When the seed germinates, the embryo grows further. Germination may depend on the availability of oxygen, a suitable temperature, or adequate light. Germination requires the availability of stored food within the seed. In plants called monocots (monocotyledon plants), most of the food is stored in the endosperm, in one seed leaf called a cotyledon...
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- Fall '07