Bryophyta

1. Lacks true roots,stems and leaves
   1. Does not posses vascular tissue

      Anotações:

      • reliance on turgor  remain relatively small

Anotações:

• the dominent phase is the gametophyte.(haploid plant)

1. GAMETOPHYTE
   1. Grows from a spore

1. Protonema
   1. Gametophyte
      1. Leaf like structures
         1. One cell thick

            Anotações:

            • only one cell thick to increase surface area for photosynthesis.
         2. supported by stem like structures
         3. rhizoids act as anchors

            Anotações:

            • a group of fine multicellular filaments often obtain water and mineral ions. however they are small so do not penetrate the soil deeply. mosses need to stay in damp areas.
      2. lacks cuticule
         1. require a moist enviroment
      3. Gametangia develop
         1. antheridia: sperm

            Anotações:

            • sperm - antherozoids
         2. archegonia: egg

            Anotações:

            • egg - ova
         3. sporophyte
            1. develops from zygote

               Anotações:

               • zygote - fertilised egg
            2. consists of seta and sporangium
               1. stalk and capsule
               2. contains spores
            3. totally dependent on gametophyte
            4. no free living sporophytes
            5. possesses a cuticle and stomata