| key concept 27.1 Primary Endosymbiosis Produced the First Photosynthetic Eukaryotes
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| Several distinct clades of algae were among the first photosynthetic eukaryotes
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| Two groups of green algae are the closest relatives of land plants
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| There are ten major groups of land plants
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| key concept 27.2 Key Adaptations Permitted Plants to Colonize Land
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| Adaptations to life on land distinguish land plants from green algae
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| Life cycles of land plants feature alternation of generations
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| Nonvascular land plants live where water is readily available
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| The sporophytes of nonvascular land plants are dependent on the gametophytes
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| Liverworts are the sister clade of the remaining land plants
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| Water and sugar transport mechanisms emerged in the mosses
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| Hornworts have distinctive chloroplasts and stalkless sporophytes
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| key concept 27.3 Vascular Tissues Led to Rapid Diversification of Land Plants
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| Vascular tissues transport water and dissolved materials
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| Vascular plants allowed herbivores to colonize the land
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| The closest relatives of vascular plants lacked roots
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| The lycophytes are sister to the other vascular plants
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| Horsetails and ferns constitute a clade
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| The vascular plants branched out
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| Heterospory appeared among the vascular plants
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| Apply What Youâve Learned
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