66 C. The Angiosperms: The flowering plants are the most diverse and widespread group of plants in existence today. There are presently about 235,000 species, all of which are placed into one Phylum, the Anthophyta (from the Greek “antho” meaning flower). The Phylum is further subdivided into two classes: the Monocotyledones , which includes the grasses, lilies, palms, and grain crops; and the Dicotyledones , which includes roses, legumes, sunflowers, and trees like poplars and oaks. Flowering plants exhibit a wide range of reproduction strategies including vegetative (asexual) and sexual reproduction. Because most angiosperms are hermaphroditic , sexual reproduction can occur either through self-fertilization or through cross-pollination (outcrossing). The evolutionary consequences of these different breeding systems are quite different. For sedentary organisms like plants, dispersal can often only be accomplished through processes related to reproduction. Pollen, seeds and fruits are all adapted for dispersal. In general, dispersal is aided by both abiotic
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