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Lecture.20 - Mesozoic Plants The importance of plants In...

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Mesozoic Plants
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The importance of plants In most terrestrial habitats, plants form the basis of the food chain- they synthesize food from inorganic chemicals (animals can not do this and would starve in the absence of organisms that can) Plants use sunlight to drive a chemical reaction (photosynthesis) whereby oxygen and carbon dioxide are combined to make sugar, which becomes food for the plant Herbivores then eat the plant and are in turn eaten by carnivores Finally, organisms specializing in decomposing other organisms use the nutrients originally fixed by plants before returning it to the environment
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A major division exists between plants that have vascular tissue, xylem (transports water) and phloem, (transports organic nutrients) and those that do not Plants with vascular tissue are called vascular plants, while those lacking it are called non- vascular plants Major plant groups http://universe-review.ca/I10-22a-root2.jpg
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Vascular plants are able to transport water
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