spermatopsida wikipedia - EAS
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A spermatophyte (lit. 'seed-bearing plants'; from Ancient Greek σπέρματος (spérmatos) 'seed', and φυτόν (phytón) 'plant'), also known as phanerogam (taxon Phanerogamae) or phaenogam (taxon Phaenogamae), is any plant that produces seeds, hence the alternative name seed plant. … Meer weergeven
The extant spermatophytes form five divisions, the first four of which are traditionally grouped as gymnosperms, plants that have unenclosed, "naked seeds":
• Meer weergevenA whole genome duplication event in the ancestor of seed plants occurred about 319 million years ago. This gave rise to a series of evolutionary changes that resulted in the origin of seed plants.
A middle Devonian (385-million-year-old) precursor to … Meer weergevenSeed-bearing plants are a subclade of the vascular plants (tracheophytes) and were traditionally divided into angiosperms, or flowering plants, and gymnosperms, which includes the … Meer weergeven
• Kron, Kathleen A; Chase, Mark W (2005-11-17). Molecular systematics and seed plant phylogeny: a summary of a parsimony analysis of rbcL sequence data. pp. 243–252. Meer weergeven
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