BIOL 2200 Chapter Notes - Chapter 29: Non-Vascular Plant, Charophyta, Sporophyte
6 Mar 2017
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Document Summary
Flagellated sperm of land plants closely resemble that of charophytes. Atmosphere provided plentiful sunlight: lack of water and structural support provided challenges. Derived traits of plants: adaptations that emerged after land plants diverged from algae, alternation of generations. Alternation between 2 generations: gametophyte and sporophyte. Multicellular haploid gametophyte produced by haploid gametes through mitosis. Haploid gametes (eggs and sperm) fuse during fertilization to form a diploid zygote. Zygote replicates through mitosis produces a multicellular sporophyte. Sporophyte produces unicellular haploid spores by meiosis. 29. 2 mosses and other nonvascular plants have life cycles dominated by gametophytes. 3 phylum of nonvascular plants: liverworts, mosses, hornwarts, *earliest lineages to have diverged from common ancestor of land plants, evidence: earliest spores of land plants are similar to those of mosses and hornworts. Bryophyte sporophytes: dependent on parental gametophytes for food and water, produce large numbers of spores.
