Question

introduction of bryophyta division

Answer 1

Bryophytes are an informal group consisting of three divisions of non-vascular land plants (embryophytes): the liverworts, hornworts and mosses.They are characteristically limited in size and prefer moist habitats although they can survive in drier environments.The bryophytes consist of about 20,000 plant species.Bryophytes produce enclosed reproductive structures (gametangia and sporangia), but they do not produce flowers or seeds. They reproduce via spores. Bryophytes are usually considered to be a paraphyleticgroup and not a monophyletic group, although some studies have produced contrary results. Regardless of their status, the name is convenient and remains in use as an informal collective term. The term "bryophyte" comes from Greek βρύον, bryon "tree-moss, oyster-green" and φυτόν, phyton "plant".

The defining features of bryophytes are:

Their life cycles are dominated by the gametophyte stageTheir sporophytes are unbranchedThey do not have a true vascular tissue containing lignin (although some have specialized tissues for the transport of water)

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Answer 2

The division Bryophyta (Gr. bryon=moss) includes over 25000 species of non-vascular embryophytes such as mosses, liverworts and hornworts.

Bryophytes are small plants (2cm to 60cm) that grow in moist shady places. They don’t attain great heights because of absence of roots, vascular tissues, mechanical tissues and cuticle. They are terrestrial but require external water to complete their life cycle.

Hence, they are called “Amphibians of plant kingdom”.