Lesson 1 - Green Plants Phylogeny laid plants have haploid and diploid stages Challenges to Terrestrial life are availability to water Desiccation

Lesson 1 - Green Plants Phylogeny laid plants have haploid...

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Green Plants Phylogeny - laid plants have haploid and diploid stages Challenges to Terrestrial life are availability to water - Desiccation - Transport of water - Supporting plant body o Above and below ground - Obtaining nutrients from soil - New methods of reproduction o More genetic diversity Haplodiplontic life cycle: alternation of generations - Haploid and diploid stages occur and are multicellular - Haploid gametophyte o Produces gametes by mitosis - Gametophyte - gamete plant (haploid by mitosis) - Diploid sporophyte o Produces haploid spores by meiosis - Sporophyte is multicellular – spore plant (produces diploids by meiosis) Bryophytes - Closest living descendants of laid plant - Nonvascular - No seeds - Not tracheophytes – no tracheid - Gametophyte - Require water for sexual reproduction o Don’t have roots for water transport o Common in moist plants Ex liverworts and mosses Tracheophytes/euphyllophytes
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