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Plant Kingdom — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYPlant Kingdom2 Marks
Question
Write any four characteristics of Pteridophytes.
✓

Answer

  1. The plant body or the dominant phase in the life cycle is a sporophyte, which is differentiated into true roots, stem and leaves.
  2. All these organs possess well-differentiated vascular tissues.
  3. Sporophylls bear sporangia, in which spores are produced by meiosis in spore mother cells; sporophylls may be arranged into compact structures, called strobili or cones.
  4. Each spore germinates (by mitosis) into a multicellular, inconspicuous, autotrophic structure, called prothallus, the gametophytic phase.
  5. The prothallus bears antheridia and archegonia, where the male and female gametes are produced.
  6. Water is essential for fertilisation and the zygote develops into the sporophyte.

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