BIOLOGY 1M03 Lecture Notes - Lecture 15: Bicornuate Uterus, Stereopsis, Knuckle-Walking
15 May 2017
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Document Summary
Adaptation for climbing and other forms of locomotion (leaping, walking on 2 or 4 limbs, knuckle walking, brachiation) Most have opposable thumbs and prehensile tails; grasping hands. 3-color vision in some species; eyes encased in a bony orbit. Nails instead of claws on toes and fingers. Claws are typically curved, pointed, and compressed sideways. Primate hands generally have 5 digits, usually with nails. Presence of nails may be correlated with small branch foraging. Has flaps of skin between legs used for gliding. As large as entire brain excellent hearing. Fossil record indicates that monkeys reached south america by the late. These evolved into the flat nosed primates. These are morphological links between primate fossils from africa and nwm. Teeth are informative because they are complex structures that reflect dietary specialization: frugivory, folivory, insectivory. Teeth grow through well defined developmental sequence. Teeth generally preserve better than other bones. Insectivore (tarsier: sharp-pointed incisors: tears open exoskeletons, 3-cusped triangular molars.
