BIOL-1507EL Lecture Notes - Lecture 1: Archegonium, Sporophyte, Gametophyte
21 Dec 2019
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Plants and colonization of land (txt book chapter 26 page 562) Gametophyte: structure and production of gametes, female gamete archegonia, male gamete arthedrium, fertilization needs film of water, pollen can be transfer by many factors, wind, animals ( bats at night , bees. Sporophyte: self producing gametes by mitosis, alternation of generation. All plants defined in this text are: multi-cellular, eukaryotes that are photosynthetic, autotrophs. Plants have: cell walls made of cellulose. Mitosis occurs in all plants, proceeding through the typical phases. Generalized view of plant reproduction and life cycle. Nearly all plants reproduces sexually and most are capable of asexual propagation. In the life cycle of all plants an alteration of generation occurs, in which a haploid (1n) gametophyte and diploid (2n) sporophyte take turns producing one another. For more than the first three billion years of earth"s history, the terrestrial surface was lifeless. Evidence suggests that land plants have evolved from aquatic green algae ( known as.
