Pteridophyta


 
 
Concept Explanation
 

Pteridophyta

These are the oldest vascular plants, or plants which have vascular tissue.

  • The plant body is sporophyte which produces spores and gametophytic plant body is reduced to some cells and porduce gametes. Both the plant phases are independent of each other. 
  • Their bodies are differentiated into an aerial shoot system and an underground root system.
  • The reproductive organs are multicellular.
  • The pollen produced by these plants is carried by the wind and an embryo develops after fertilization.
  • These plants do not produce seeds, or are seedless plants.All ferns fall under this group. They are the most developed seedless plants.
  • They have large leaves which are divided into leaflets. The young frond (leaf) is coiled at the tip.
  • As it grows, the tip uncoils.
  • The reproductive organs in the members of cryptogams (thallophyta, bryophyta and pteridophyta) are inconspicuous or hidden.
  • They produce naked embryos after fertilization (union of male gamete with female gamete) that is called spores.
  • In the case of phanerogams (gymnosperms and angiosperms), seeds are produced after fertilization. They contain embryo along with stored food. The stored food provides nourishment to the developing embryo.
  •   Example : Marsilea, Salvinia, Azolla, Equisetum, Selagenilla bryopteris(sanjeevani booti) etc.
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    Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    Fern leaves bearing spores are called __________________ .

    Right Option : C
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    Explanation
    Question : 2

    Fronds are ___________________

    Right Option : A
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    Explanation
    Question : 3

    Which of the following plant classifications is characterized by the presence of a vascular tissue but not seeds ?

    Right Option : B
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    Explanation
     
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