BISC 337 Lecture Notes - Lecture 23: Paleobotany, Gymnosperm, Adaptive Radiation

• School: Simon Fraser University
• Department: Department of Humanities Biological Sciences
• Course: BISC 337
• Professor: Aubrey Pearson

Document Summary

What accounted for this rapid evolution: was evolution rapid or, was there a long period of evolution with no fossil record, angiosperms may have evolved in cool, dry uplands, cladistic analyses suggest an earlier evolution. Ancestral group: not known, angiosperms have been linked to various gymnosperms based on features of the flower (no last gymnosperm and first angiosperm, darwin called the origin of flowering plants an abominable mystery . The emergence of seed plants further transformed the earth. Seeds and other adaptations of gymnosperms to some extent and mainly of angiosperms, heightened the ability of plants to survive and reproduce (natural selection) in diverse terrestrial environments. These plants became the principle producers in the food webs of most ecosystems on land. Adaptive radiation of species who evolved to ear seeds and fruits??? (including hominid ancestors??) (remember, we can"t digest cellulose) Angiosperms may have evolved in the uplands of the ancient supercontinent.