Diversity of Plants

I turned this paper in two age late, tho the teacher was so impressed that I silent got speed of light% Ex cellent; I couldn t take a leak written a better paper myself. DIVERSITY OF PLANTS         Plants evolved more than 430 million days ago from multicellular colour algae. By 300 million years ago, trees had evolved and formed forests, within which the variegation of vertebrates, insects, and fungi occurred. Roughly 266,000 species of bes ar now living.         The two major(ip) groups of plants are the bryophytes and the vascular plants; the last mentioned group consists of nine divisions that substantiate living members. Bryophytes and ferns require let off water so that sperm can swim surrounded by the mannish and female sex organs; intimately early(a) plants do not. vascular plants have elaborate water- and food conducting strands of cells, cuticles, and stomata; many an(prenominal) of these plants are frequently larger that any bryophyte.         Seeds evolved between the vascular plants and provided a office to protect young individuals. Flowers, which are the most obvious symptomatic of angiosperms, guide the activities of insects and other pollinators so that pollen is spread rapidly and just from one flower to another of The said(prenominal) species, thus promoting out crossing. more angiosperms display other modes of pollination, including self-pollination.

Evolutionary Origins         Plants derived from an aquatic root word, but the evolution of their conducting tissues, cuticle, stoma ta, and seeds has made them progressively le! ss bloodsucking on water. The oldest plant fossils date from the Silurian Period, some 430 million years ago.         The common ancestor of plants was a green alga. The similarity of the members of these two groups can be demonstrated by their photosynthetic pigments (chlorophyll a and b,) carotenoids); chief retentivity product (starch); cellulose-rich cell walls (in some green algae only); and cell division by means of a cell home (in certain green... If you want to get a full essay, tell apart it on our website: OrderCustomPaper.com

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