Psychology 3221F/G Lecture Notes - Lecture 2: Advantageous, Rock Dove, Harmonia Axyridis

• School: Western University
• Department: Psychology
• Course: Psychology 3221F/G
• Professor: David Sherry

Document Summary

David hull: evolutionary theory seems so easy that almost anyone can misunderstand it. Darwin: familiar w 3 unsolved problems in 19th century biology: Change in life on earth - sedimentary rocks; younger is always on top of old rocks. Used layers of rocks to estimate the age of the fossils. Hierarchical organization of life - possible to categorize life. Change in life: devonian: 416 mya silurian: 443 mya ordovician: 488 mya. Darwin & geologists of his time knew fossils preserved a record of change in life on earth. As the age of fossil-bearing rocks increased, the record of life they preserved became increasingly unlike the present. Linnaeus showed that living things can be classi ed into groups. Many groups show minor variations within the group & large differences bt groups. Eg genus euphonia - 10 species of variation. Many proprieties of living things are adaptations: features that appear designed to serve a function.