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Dictionary » G » Gymnosperms GymnospermsGymnosperms gymnosperms are a group of vascular plants whose seeds are not enclosed by a ripened ovary (fruit). Gymnosperms are distinguished from the other major group of seed plants, the angiosperms, whose seeds are surrounded by an ovary wall. The seeds of many gymnosperms (literally, naked seed) are borne in cones and are not visible. Taxonomists now recognise four distinct divisions of extant gymnospermous plants (coniferophyta, cycadophyta, ginkgophyta, and gnetophyta).
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Results from our forumThe Colin Leslie Dean species paradox... identified eukaryote species we have: * 1.6 million, including: o 297,326 plants, including: + 15,000 mosses, + 13,025 Ferns and horsetails, + 980 gymnosperms, + 258,650 angiosperms, # 199,350 dicotyledons, # 59,300 monocotyledons, o 28,849 fungi & other non-animals, including: + 10,000 lichens, ...
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The Colin Leslie Dean species paradox... identified eukaryote species we have: * 1.6 million, including: o 297,326 plants, including: + 15,000 mosses, + 13,025 Ferns and horsetails, + 980 gymnosperms, + 258,650 angiosperms, # 199,350 dicotyledons, # 59,300 monocotyledons, o 28,849 fungi & other non-animals, including: + 10,000 lichens, ...
See entire post
The Colin Leslie Dean species paradox... identified eukaryote species we have: * 1.6 million, including: o 297,326 plants, including: + 15,000 mosses, + 13,025 Ferns and horsetails, + 980 gymnosperms, + 258,650 angiosperms, # 199,350 dicotyledons, # 59,300 monocotyledons, o 28,849 fungi & other non-animals, including: + 10,000 lichens, ...
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Re: New perspectives in theory of evolution... has important meaning in biology (see diagram). http://wm59.inbox.com/thumbs/a_19cf01_1cbbe6df_oG.gif.thumb Simple plants and gymnosperms include above 150 thousands specieses, angiosperms above 250 t. specieses, fungi 1,5 mln, insects about 1 mln, primitive animals tens thousands, ...
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Alternation of generationalternation of generation is only in pteridophytes(seedless).Spermatophytes(gymnosperms and angiosperms) don't exibit alternation of generation
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