Organs that anchor vascular plants enable vascular

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organs that anchor vascular plants Enable vascular plants to absorb water and nutrients from the soil May have evolved from subterranean stems 16
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early vascular plants (Ferns and Lycophytes) probably produced the first forests. The growth of these early forests may have helped produce the major global cooling that characterized the end of the Carboniferous period Much of this organic matter built up as peat and eventually became coal Giant dragonflies were also present!! 17
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How would the growth of these early vascular plants contribute to cooling? A. They shaded the earth B. They took up carbon dioxide C. They increased the oxygen concentration of the atmosphere QUESTION 18
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Forests may have contributed to global cooling during the late Carboniferous Carbon dioxide uptake by plants decreased global temperatures Glacier formation followed this time 19
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Land plant evolution (bryophytes) plants Nonvascular Plants Liverworts Origin of plants (about 470 mya) ANCESTRAL GREEN ALGA Mosses Hornworts plants vascular Seedless Vascular plants Lycophytes (club mosses, spikemosses, quillworts) Origin of vascular plants (about 425 mya) Monilophytes (ferns, horsetails, whisk ferns) Gymnosperms Origin of seed plants (about 360 mya) Angiosperms 500 Seed plants 450 400 350 300 50 0 Millions of years ago (mya) 1 2 3
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Feeding the World- Seed Plants Fossils show evidence of seed plants about 360 million years ago About 13,000 years ago human started to domesticate wheat, maize, bananas, and other wild plants. This occurred simultaneously in multiple places (e.g. East Asia, Africa and Americas) 21
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“Nobody is qualified to become a statesman who is entirely ignorant of the problem of wheat.” -Socrates Seeds changed the course of plant evolution and human culture Enabled their bearers to become the dominant producers in most terrestrial ecosystems Enabled humans to move from hunter-gatherer
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  • Fall '18
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