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Life cycle evolution - Coggle Diagram

- - - - megagametophyte
        
        egg cell
        
        multicellular haploid
      - microgametophyte
        
        multicellular haploid
        
        pollen grain
    - - intermediate growth
      - annual to perennial
      - flowering plants diverse
  - - - gametophyte reduced to microscopic
      - large dominant diploid stage
    - - microgametophyte
        
        pollen
      - megagametophyte
        
        nutritive tissue
        
        protected by integuments
        
        within ovule
- - - - dominant life stage
      - antheridiophore
      - archegoniophore
    - - small, temporary structures
      - parasitic to gametophyte
      - meiosis occurs in sporangium
  - - - dominant life stage
      - archegonial head
      - antheridial head
    - - meiosis occurs in sporanguim
      - parasitic to gametophyte
      - small, temporary structures
- - - - sori
        
        sporangia
        
        indusia
      - large persistant diploid
    - - megagametophytes
        
        female
      - microgametophytes
        
        male
  - - - 1 megasporocyte per megasporanguim
      - heterosporous
    - - male and female develop in spore wall
      - small
- - - - Antithetic/interpolation theory
        
        predictions
        
        heteromorphic generations
        
        simple, short-lives sporophytes
        
        complex, persistent gametophytes
        
        zygote undergoes mitotic division