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Give a general account of cycadofilicales stating its affinities |
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Answer» The Pteridospermales are popularly known as “seed-ferns”. They POSSESSED fern-like foliage, bore seeds, and are, therefore, called pteridosperms. They first appeared on the earth in Upper DEVONIAN times of the Palaeozoic era (Fig. 1.1). They were at their CLIMAX in Carboniferous period and BECAME extinct in Jurassic period of Mesozoic era. |
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