BIO 2137 Lecture Notes - Lecture 8: Paraphyly, Gametangium, Bryidae
7 Oct 2016
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Gametophyte is dominant member of cycle (the actual plant) Differ from charophyceae by: gametandia called antheridia and archegonia, which possess a protective layer (sterile jacket layer, there probably to retain humidity, zygote and developing embryo are retained within the archegonium on the female gametophyte c. Increases number of meiosis thus more spores: spores of sporopollenin: the yellow stuff around the pollen. (very hardy molecule. ) d. i. Charophyceae has sporopollenin on outside of ____ zygote: tissues made by apical meristem e. i. Moist environment, dominate ecosystem above treeline tundra. Small mat forming habit compensates for absence of conducting tissue. Pores lack cuticle. (no waxy layer) on liverworts. Stoma on hornwarts and mosses synapomorphy to vascular plants. Fragmentation or produce gemmae: gemmae cups: rain helps disperse cups. Males and females) or monoecious (single individuals have two separated sexes) Archegonia produce eggs: flask shaped, basal portion (venter) makes single egg. Neck cells break down and allow sperm to swim in when plant is mature.
