Please enable JavaScript.

Coggle requires JavaScript to display documents.

CH 20 NONVASCULAR PLANTS: MOSSES, LIVERWORTS, HORNWORTS (DIVISON BRYOPHYTA…

- - - - development of vascular tissues xylem/phloem
        
        origin of seeds, leaves,& woody growth
- - - - not leafy
      - Thallus
        
        body
      - large air pores
    - - resemble moss
  - - - foot, seta, calyptra sporangium
    - - lacks columella
      - no peristome teeth
      - differentiate into elaters
        
        single elongate cells
- - - - absorbs sugar, minerals, water
    - - outer+inner layer sterile cells
    - - narrow stalk
  - - - some desiccation tolerant
      - some species grow in moist habitats
  - - - occurring in all parts of world&enviornment
    - - thrive in many places within cities
    - - Gametophores
        
        leafy stems
        
        grow from apical meristems
      - not homologous w/ vascular plants
    - - (Polytrichaceae) innermost cortex
        
        HYDROIDS
        
        cells that conduct water&dissolved minerals
        
        most mosses lack these
        
        Leptoids
        
        ensemble sieve cells
        
        most mosses lack these
      - conducted along exterior stem by capillary action
        
        leaves + stems act as capillary channels
    - - Spore germinates
        
        sends out long chlorophyllous cell
        
        gametophore growth begins
        
        cell undergoes mitosis
        
        produces branches system of similar cells
        
        PROTONEMA
        
        1 more item...
    - - Sperms are produced from ANTHERIDIA
        
        short stalk
        
        outer layer of sterile cells
        
        inner mass of cells
        
        differentiate into sperm cells
      - Eggs occur in ARCHEGONIA
        
        occurs on same Antheridia gametiophore(bisexual)
        
        male & female gam (other species)
      - Rain carries them
        
        Secretion of sucrose guides sperm
        
        toward Archegonia
        
        sperm affects fertilization
- - - - succulent but brittle
      - doesn't tolerate drying
  - - - multicellular
      - do not have spirally thick walls
- - - - NO SEEDS OR VASCULAR
      - multicellular sporangia & gametangia
      - embryophytes
      - reproductive cells surrounded by layers of sterile cells