What are the stages of an angiosperms life cycle?
The angiosperms, being seed plants, exhibit a life cycle that is in many respects similar to that found in gymnosperms, but there are also significant differences. The gametophytes of angiosperms are much reduced in size and cell number. The mature microgametophyte within the pollen grain consists of only three cells, and the mature megagametophyte within the ovule, in most angiosperms, consists of only seven cells and eight nuclei. Archegonia are lacking. The ovules are enclosed in a carpel. Pollination in angiosperms is indirect in that pollen is deposited on the stigma of the carpel rather than directly on the ovule as is the situation in gymnosperms. The nutritive tissue for the future embryo is not haploid tissue of the megagametophyte, formed prior to fertilization, but consists of a new tissue called endosperm and is initiated concurrent with zygote formation. After fertilization the tissue of the ovary develops into a fruit. In many angiosperms the fruits are variously modified
