The pteridophytes evolved in the Silurian period & subsequently got diversified in Lower Devonian period. There are controversies regarding their origin & evolution.
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Topic 12: Evolution of Sporophytes in Bryophytes: Cryptogams: Chapter 2: Paper 1: Botany Optional for UPSC
Video Link – https://youtu.be/8RDmEC3NdR0
Topic 13: Origin of Bryophytes: Cryptogams: Chapter 2: Paper 1: Botany Optional for UPSC
Video Link – https://youtu.be/_ZmyBOk5amw
Topic 14: Structure and Reproduction in Sphagnum: Cryptogams: Chapter 2: Paper 1: Botany Optional for UPSC
Video Link – https://youtu.be/-q5YBMdD65Q
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