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 [ăńjē-ə-spûrḿ]
Dictionary.com · The American Heritage® Dictionary
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Both types of sporangia are formed in flowers. ... In most angiosperms, the flowers are perfect: each has both microsporangia and megasporangia. ... Some angiosperms are imperfect, having either microsporangia or megasporangia but not both.
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Flowering plant - Wikipedia, the free encyclopedia
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Amborella and the root of the angiosperm evolutionary tree ... The oldest unambiguous angiosperm fossil extends back at least to the early Cretaceous, conservatively around 132 million years ago (mya) (see Crane et al., 2004). Floral size, structure, and organization in early angiosperms varied tremendously,
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Given the increasing support for the outlines of angiosperm phylogeny, a stable consensus classification based on this phylogeny seems attainable. ... Here I very largely follow the Angiosperm Phylogeny Group classification (APG 2003), although with one or two more orders and with a number of unplaced families in slightly...
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The Angiosperm Life Cycle ... The Angiosperm Fruit ... of an Angiosperm; (Campbell 6th Ed. 610-611, Fig. 30.17; 7th Ed. 599-601, Fig. 30.10)
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Angiosperm Life Cycle ... The parts of an Angiosperm include: ... Flowers, which are the reproductive structures of an angiosperm and consist of four whorls of modified leaves (from outside in):
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Click here for a cladogram which illustrates our current understanding of basal angiosperm relations. ... Despite the problems in recognizing basal angiosperm taxa, the standard distinctions between dicots and monocots are still quite useful.
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The angiosperm life cycle possesses the following advances over conifers: ... Arbitrarily begin the angiosperm life cycle with the development of the diploid flower on the mature sporophyte plant. Within the anther microsporocytes develop and undergo meiosis to produce haploid microspores.
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The angiosperms took it one step further. They not only have seeds, but they also have flowers. What kind of an advantage is that? Many angiosperm species use wind for pollination the way that gymnosperms do. What if you didn't need to rely on the wind to spread your pollen around anymore?
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