Botany Test 2

  1. Plant Evolution
    • Began 500 million years ago
    • 450 moved to land
    • 300 seeds formed
  2. Charophytes
    Closest relative to the plants from the green algae family
  3. 5 Differences Between Plants and Algae
    • apical meristems
    • spores produced in multicellular sporangia
    • multicellular gametangia
    • produce a multicellular depenent embryo
    • allteration of generations
  4. Sporopollenin
    A thick coating on seeds that keep them safer, this is not present in charophytes
  5. Antheridia and Archegonia
    The gametangia that can be formed for the plants

    • Archegonia is female organ
    • Antheridia is the male organ
  6. Alternation of GenerationsĀ 
    Lifecycle where a multicellular sporophyte and a multicellular gametophyte take turns producing each other gametophyte always being haploid and the the sporophyte always being diploid
  7. 5 Evolutionary Changes
    • Cuticle Formation- protective coating to keep leaves from drying outĀ 
    • Protection of the Embryo by the mother plant or some other method
    • Vascular Tissue once you get into the seedless vascular plants
    • Seeds forming to help with fertilization and spreading the species
    • Flowers to attract pollinatorsĀ 
  8. Bryophytes
    Small, fake leaved plants with no vascular tissue that often grow in temperate or tropical forests and near wetlands and streams
Card Set
Botany Test 2
Details needed to know and vocabulary needed to understand botany more deeply