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angiosperm |
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angiosperm (ăn`jēəspûrm'), term denoting seed plants in which the ovules, or young seeds, are enclosed within the ovary (that part of the pistil specialized for seed production), in contrast to the gymnosperms, in which the seeds are not enclosed within an ovary. The angiosperms constitute the division Magnoliophyta Magnoliophyta (măg'nōlēŏf`ətə) ..... Click the link for more information. and include all agricultural crops (including the cereal grains and other grasses), all garden flowers and most horticultural plants, all the common broad-leaved shrubs and trees, and all the usual field, garden, and roadside weeds. The angiosperms are the most economically important group of all plants. |
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| ? Mentioned in | ? References in periodicals archive | |
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They also
scrutinized two chloroplast genes and one other gene taken from 84
species of angiosperms. In fact,
"insects may have spurred angiosperm diversity rather than the
other way around," says coauthor Conrad C. Paleobotanists have spent years searching for the
earliest angiosperm ancestors, but those efforts have failed because
researchers have kept the wrong image in mind, say Hickey and Taylor. |
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