ANT 100 Lecture Notes - Lecture 8: Human Migration, Homeostasis, Genetic Drift
Document Summary
Major climatic shifts in africa 60-70,000 years ago from sudden cooling of earth driven by last ice age. Sharp reduction in population size (fewer than 10,000 people) First went to asia 70,000 europe more recent north america most recent. Humans continually evolve as we continue to adapt to our environments. Shaped through four different mechanisms, especially natural selection. Characteristics that worked in a place/time and were passed down through generations. Random natural events like hurricanes/earthquakes wiping out entire populations. Can be spontaneous through errors occuring in dna processing or induced through environmental factors like radiation. Migration, transfer of genes from one population to another. Not all mutations are at the genetic level. Successful interaction with the environment from population to single cell to maintain the normal functioning of the human body. Stress: factors interfering with normal limits of operation of an organism. Homeostasis: physiological sense, maintenance of normal body functioning.
