BIOLOGY 1M03 Lecture 15: Lecture 15 – Chapter 9
7 Feb 2017
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Hominoid (ape) diversification in time and space; social systems. Evolution of key features: pelvis, teeth skull, locomotion. Human evolution began with the origin of life 3. 8 bya. We focus on a very recent portion of this history when mammals were present: 180 ( ?) If the entire evolution of the planet occurred in one oday, mammals would have appeared in the last 32 minutes of this dy. Humans would have diverged from chimps in the last 2 minutes of this day. A type of plant that has flowers (vascular have a circulatory system) Many produce fruit and have endosperm within seeds. Seeds are an innovation that evolved in the ancestor of gymnosperm and angiosperm plants. Before seeds evolved, all plants used spores. Spores, unlike seeds, have very little food resources for nutrition. Gymno have no cover over the seeds. By the last cretaceous, angiosperms dominated habitat formerly occupied by ferns an slide 17.
