The following points highlight the top nine theories about ancestors of angiosperms. Some of the theories are: 1. The Isoetes – Monocotyledon Theory 2. The Coniferales-Amentiferae Theory 3. The Gnetaies’-Angiosperm Theory 4. The Anthostrobilus (Bennettitalean) Theory 5. The Caytonialean Theory 6. The Stachyospory-Phyllospermae Theory 7. The Pteridosperm Theory and Others. 1. The Isoetes – Monocotyledon […]
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