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telom theroy
The "Telome theory" of Walter Zimmermann (1930, 1952) is the most accepted theory that is ...
sporophytic evolution of ferns
Origin of ovule in pteridospermales is seen in paleozoic era so the ovule is called paleozoic ovule,...
Heterospory
progymnosperm lecture 2nd year
Structure and evolution of female gametophyteof gymnosperms
evolution of plants through different geological time scale
