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Diverrsity Of Plants
Beginning of essay
Plants evolved more than 430 million years ago from multicellular green
algae. By 300 million years ago, trees had evolved and formed forests, within
which the diversification of vertebrates, insects, and fungi occurred. Roughly
266,000 species of plants are now living.
The two major groups of p ....
Middle of essay
....ion by means of a cell
plate (in certain green algae only).
Major Groups
As mentioned earlier, The two major groups of plants are The bryophytes-
-mosses, liverworts, and hornworts--and The vascular plants, which make up nine
other divisions. Vascular plants have two kinds of well-defined conducting
strands: xylem, which is specialized to conduct water and dissolved minerals,
and phloem, which is specialized to conduct The food molecules The plants
manufacture.
Gametophytes and Sporophytes
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| Number of words: 2857 |
Approximate pages: 11 |
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