PSYC18H3 Lecture 2: PSYC18 LECTURE 2
Document Summary
Charles lyell: geologist, theory of uniformitarianism, the earth shaped by forces still in action today, revolving, constantly changing, complete opposite to christian thought not something that evolved over time. Thomas malthus: economist, population growth is kept in check by various vices, death, hunger, disease, keeps our population in check (kind of like survival of the fittest) Variation in their beaks depending on the island they came from. Beak evolves to meet the demands of the island (food source) Genetic variation within species: genotype phenotype. Selective pressures: environmental factors favour certain genes, example. Pesticide resistant insects most of the insects die out, but some live pass onto next generation. Male peacocks chosen on the basis of their beautiful tail, once it"s too heavy, they can"t travel they die out and cycle restarts. The goal of natural selection : passing on our genetic code, via survival, reproduction and child care, emotions help us achieve goals.
