PSYB65H3 Chapter Notes - Chapter 2: Omnivore, Molecular Clock, Homeobox
Document Summary
Cladogram: a graph that shows the relative time of origin of various closely related groups. Each branch point in a cladogram distinguishes animals positioned before that time point from animals positioned after it by one or more physical or behavioral traits. In past 5-8 million years, hominids (humanlike ancestors) diverged from the ape lineage by acquiring characteristics that diverged from the apes. Being taller with less height differences between males and females. They were bipedal with long legs, being able to travel large distances. Changes in hand structure allowed for tool use. Changes in tooth structure and reduction in jaw size allowed for more varied diet. The brain increased three times its size. Behavioural traits in common social living, tool use, omnivorous foraging. Rats are good because their brains are a lot like humans. Slugs are studied how neurons connect to behaviour because slugs have a simple nervous system.
