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Question

Draw labelled diagrams of
a. Female and male thallus of a liverwort
b. Gametophyte and sporophyte of Funaria
c. Alternation of generation in Angiosperm

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Solution

a. Diagram of the thallus of a liverwort:



Description:
  • Thallus: The flattened simple body
  • Gemma: Asexual buds located in thallus
  • Antheridiophore: Present on the male thallus bearing antheridia
  • Archegoniophore: Present on the female thallus bearing archegonia
b. Diagram of complete sporophyte on gametophyte of Funaria:


Description:
  • Rhizoids: Provide anchorage
  • Main axis: Central axis bearing leaves and other structures
  • Leaves: Photosynthetic structures around main axis
  • Setae: Middle elongated structure of the sporophyte
  • Capsule: Contains spores
c. Diagram of alternation of generation in Angiosperm


Description:

The angiosperms go through a Haplo-diplontic life cycle.
  • Gametophytic phase: Haploid
○ Male: Pollen grains
○ Female: Embryo sac
  • Sporophytic phase: Diploid
○ Plant parts like:
■ Roots
■ Stems
■ Leaves
■ Floral parts like anther, filament,
stigma, style, ovary

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