ANTH 1 Lecture Notes - Lecture 9: Issf 10 Meter Air Rifle, Paleomagnetism, Biostratigraphy
Document Summary
Hominid: all great apes (humans included) chimps, gorillas, orangutans. Morphology: (both ancestral and derived traits: anteriorly oriented foramen magnum (toward front of skull) compared to other great apes, small cranial capacity, small male canine. Ardipithecus ramidus (4. 6-6 mya: small cranial capacity, biped, long arms, divergent big toe, overall appearance makes it likely ancestor of hominins in human line. Derived trait: changed since last common ancestor: example: walk on two legs, example: forward eyes. Paleomagnetism: earth"s magnetic poles have switched positions. Biostratigraphy: use animals in the past in certain environments to determine date of site: use (cid:498)first appearance- last appearance(cid:499) date and thinner if atmosphere was dry. Tree rings: size of rings will be bigger if its good climate with water, smaller. Pliopleistocean: earth is in transition: get permanent ice caps. Alpatric and sympatric speciation: alpatric: phenomena that separates gene pools, population separation, simpatric: population overlap.
