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Megaspore


Megaspores, also called macrospores, are a type of spores that is present in heterosporous plants. These types of plants have two spore types, megaspores and microspores. Generally speaking, the megaspore, or large spore, germinates into a female (egg-producing)...
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Aspects of the topic megaspore are discussed in the following places at Britannica. Assorted References characteristics ( in spore (biology) ) ...gametophyte individuals that are entirely dependent upon the sporophyte plant. Gymnosperms and angiosperms form two kinds of spores: microspores, which give rise to male gametophytes, and megaspores, which produce...
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megaspore ( ) n. The larger of two types of spores that give rise to a female gametophyte. ... seed plants in which a megagametophyte develops from a megaspore? ...
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megaspore larger of the two types of spore produced in heterosporous plants; ... in seed plants in which a megagametophyte develops from a megaspore? ...
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GardenWeb Shopping Organization Directory Events Calendar Hortiplex Glossary ... megaspore. megaspore. The female spore of a heterosporous plant. See also: ...
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Register today for a free trial, credit card req'd. Find Journal of Paleontology articles plus many other academic journal articles, magazine articles & newspaper arc...
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A megaspore mother cell is a diploid cell in which meiosis will occur, resulting ... The one of these megaspore that remains divides mitotically and develops into ...
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This site descibes the formation of female gametes from ovule to meiosis to megaspore division to embryo sacs, female gametes and ultimately fertilization and ...
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megaspore a large spore produced in a megasporangium Source: Noland, George B. 1983. ... Iverson Software: Providing Reliable & Innovative Education Solutions ...
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Within the ovule, one diploid megaspore mother cell divides by meiosis to produce four haploid ... mitotic divisions of the haploid megaspore are labeled. ...
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... trends in seed (ovule) size and megaspore volume during the late Paleozoic. ... Key words: megaspore, paleoecology, Paleozoic, seed size, seeds, trends ...
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The new fern possesses megaspore complexes with three to four ... The megaspore wall ... megaspore either directly or by a columella (a ļ¬lamentous structure ...
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... cells thick, megasporocyte single, megaspore lacking sporopollenin and cuticle, ... The megaspore that germinates is often micropylar in other than Aroideae and ...
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Development of the megaspore. Pollination. Double fertilization. Seeds. Fruits ... Meiosis of the megaspore mother cell in each ovule produces 4 haploid cells: ...
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MEGASPORE - a female spore; one that grows into a gametophyte bearing archegonia ... 6. The megaspore develops inside the megasporangium, inside a specialized ...
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Shortly after the differentiation of the functional megaspore (Figures 7A and 7E ) ... indicating that the arrested functional megaspore does not acquire the identity ...
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