BIOL 102 Lecture Notes - Lecture 15: Neotropical Realm, Dark Skin, Light Skin
Document Summary
Neotropical migrants: birds that breed in north american but travel to central and south america for winter. It was a response to concentration of uv light in different regions: light skin helps the body produce more vitamin d, dark ski(cid:374) helped prote(cid:272)t the (cid:271)ody"s folate stores i(cid:374) su(cid:374)(cid:374)y (cid:272)li(cid:373)ates. Can a human out run a horse: over distance yes, humans can cool off better than a horse, horse has more surface area and body capacity. Selection in humans: bipedalism, loss of body hair, development of sweat glands for distance, levels of melanin. The global genetic melting pot: everyo(cid:374)e"s ge(cid:374)o(cid:373)e has various (cid:373)utatio(cid:374)s of these (cid:272)o(cid:373)po(cid:374)e(cid:374)ts (cid:272)urre(cid:374)tly, link to 40 regional reference populations, below 2% composition. What"s a population: a group of organisms that interact with each other, reproduce and live in the same geographical area. Population ecology: multidisciplinary science, biology, geography, meteorology. Ecology meshes with and is influenced by genetics, behavior and physiology and evolution.
