ANHB1101 Lecture Notes - Lecture 10: Frans De Waal, Treeshrew, Binocular Vision
5 Sep 2018
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Document Summary
Homology close relatives share similar traits due to common ancestry. Extends to behaviour from physiological and cognitive. from recent common ancestor. evolved in different directions. Closely related species are similar physiologically bc they share traits. Natural selection leads to similar organisms in similar environments- Convergence traits of unrelated or more distantly related groups assess diversity in behaviour and physiology. appear similar due to common selective traits rather than common ancestors (analogous/homoplastic traits) eg. chicken and human bipedalism, birds and flies wings. Behaviourally zebras and baboons both move in groups dilutes predation risks predation is the environmental pressure here. Warfare of humans chimp lethal intergroup aggression. Culture and traditions chimps in west africa use stone hammers. Cultural differences same as human populations. sometimes in concern of others. Spontaneous helping behaviour also occurs in great apes (frans de waal). Scale of altruism in humans is more elaborate to chimps/great apes. eg. humans willing to help a stranger.
