Please enable JavaScript.

Coggle requires JavaScript to display documents.

CH.20 Nonvascular Plants: Mosses, Liverworts, and Hornworts (Division…

- - - - mosses
    - - liverworts
    - - hornworts
- - - - gametophores
        
        leafy stems
        
        tightly pressed together forming mounds
    - - hydroids
        
        innermost cortex cells
      - leptoids
        
        cells that resemble sieve cells
      - rhizoids
        
        base of stem
        
        multicellular trichome-like structures
    - - protonema
        
        entire network of a branched system of similar cells
    - - antheridia
        
        microgametangia
        
        where sperms are produced
      - archegonia
        
        megagametangia
        
        where eggs are produced
  - - - zygote develops into small tissue
    - - upper cell dividion into simple apical sporangium
    - - between the foot and sporangium
    - - apex of the sporangium differentiates as a caplike lid
    - - cell breakage resulting in rows of teeth
    - - covers the apex
      - layer of cells derived from the neck
  - - - small size
      - lack of conducting tissues
- - - - group 1
      - gametophyte phase initiated when spores germinate
      - have two rounded lobes with no midrib or conducting tissue
      - more like mosses
    - - group 2
      - body is referred to as thallus
        
        body without roots,stems,and leaves
      - less like mosses
    - - NOT stomata
      - do not have guard cells
    - - umbrella-shaped outgrowth
      - from male gametophores
    - - apex is set of radiating fingers
      - also stalked
  - - - single, elongate cells with spring-shaped walls
      - when sporangium opens, elaters push spores out