BIOLOGY 1M03 Lecture Notes - Lecture 4: Knuckle-Walking, Stereopsis, Colugo
Document Summary
*all lecture slides belong to dr evans and the mcmaster biology facility. Homology bc its derived from a common ancestor. A homoplasy is a character shared by a set of species but not present in their common ancestor. A good example is the evolution of the eye which has originated independently in many different species. When this happens it is sometimes called a convergence. Adaptations for climbing and other forms of locomotion (leaping, walking on 2 or 4 limbs, knuckle walking and brachiation). Opposable thumbs, grasping hands, and prehensile tails. Relatively a short snouts compared to other animals. Nails instead of claws on toes and fingers. Increased reliance on stereoscopic vision to better assess depth in their envi. 3-colour vision in some species - eyes encased in a bony orbit. Named based on the shape of their nose . Have long middle fingers to dig our insects out of holes for food. Eyes are huge- big as their brain.