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An overview of bryophytes, a group of non-vascular plants that undergo a sporic life cycle. Two phyla: hepaticophyta (liverworts) and bryophyta (mosses). It discusses their structure, reproduction, and ecological significance.
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bio1120_bryophytes 3/17/
I. Nonvascular plants: Sporic Life Cycle A. Phylum Hepaticophyta (the liverworts) simpler than the mosses
B. Phylum Bryophyta (the mosses)
bio1120_bryophytes 3/17/
e. The sperm swims down the archegonium's neck to fertilize the egg producing a zygote (beginning of the diploid sporophyte generation). f. The sporophyte is a leafless, single, spindle-shaped stalk (seta), living in its later life as a parasite on the independent gametophyte (obtains most of its nourishment by means of a foot that grows down into the gametophyte tissue, although the sporophyte is capable of photosynthesis in young plants). g. The capsulated sporangium forms at the upper end of the sporophyte stalk where meiosis occurs to produce haploid spores (beginning of the gametophyte generation) released into the air.
C. Phylum Anthocerotophyta (the hornworts): may or may not be closely related to other bryophytes
II. Bryophytic Phylogeny A. Fossil Record