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19.3: Major Evolutionary Lineages - Biology

The Bryophytes (~23,000 extant species)Bryophytes arose in a period of Earth’s history before soils had formed. As green algae began to colonize the terrestrial surface, at least one of these lineages accumulated adaptations that were favorable to living on land--a waxy cuticle to prevent water loss, desiccation-resistant dispersal propagules called spores, and retention and feeding of the developing zygote.
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