ECOL 335 Lecture Notes - Lecture 1: Tetrapod, Thomas Robert Malthus, Daphne Major

• School: University of Arizona
• Department: Ecology & Evolutionary Biology
• Course: ECOL 335
• Professor: Michod & Ferriere

Document Summary

Earth, 4 bya: first life, first fossil with cellular origin is 3. 5 by old, first fossil found in the oldest known rocks. Recap of history of life: 1st billion years, oxygenic photosynthesis, 2nd billion years, goe, eukaryotic cell, multicellular life evolved several times independently, 3rd billion years, cambrian explosion, rise of animals (living) Bones of human arm, seal flipper, bat wing are homologous: 3 very different forms and functions, one shared structure. In flowering plants, homology of floral parts: all have anther and stigma, da(cid:396)(cid:449)i(cid:374)(cid:859)s e(cid:454)a(cid:373)ple of o(cid:396)(cid:272)hids, e(cid:454)t(cid:396)ao(cid:396)di(cid:374)a(cid:396)(cid:455) di(cid:448)e(cid:396)sit(cid:455) of fo(cid:396)(cid:373)s (cid:858)deep(cid:859) ho(cid:373)ologies (involve very old common ancestor) may be seen during development only, ex. Acanthostega would be found: mid-devonian rocks in northern canada have appropriate age and habitat. Natural selection and adaptation part 1: natu(cid:396)al sele(cid:272)tio(cid:374) o(cid:272)(cid:272)u(cid:396)s (cid:449)he(cid:374) . (cid:1007) (cid:272)o(cid:374)ditio(cid:374)s, 1. Trait variation can be transmitted to the next generation, inheritance: 3.