NSCI 1403 Lecture Notes - Lecture 2: Anemophily, Pollination, Zygote
9 Jul 2016
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Document Summary
Cladograms depict how close together certain groups of organisms are. The closer together two groups are, the more closely related they are to other groups. Red circles show some trait that the groups have in common from the red dot on. ex: stomata, vascular tissue, seeds. In animals, meiosis occurs in the production of sperm and eggs (gametogenesis) but not plants. Two stages: one diploid phase and one haploid phase. In plants gametes are produced through mitotic division fertilization is the 2n phase meiosis occurs in the production of spores. Spores settle in favorable environment and generate and produce the next generation. Gametophyte stage has both archegonia(female gamete producing portion) and antheridium(male gamete producing portion) in the same gametophyte plant. Primitive plants produce flagellated sperm, meaning that the plants live in or near the water. Most primitive land plants and they grow in shady damp cooler environments because they have: no true roots.
