IB35ACS Study Guide

Because of gene recombination and somatic

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Unformatted text preview: 5- 19 years) o Farming vs. Foraging ▪ Farming : feed 0.5 people per km² with foraging systems, feed 54 people per km² today with our ag practices ▪ Why farm? no general consensus as to why pops made the transition ▪ pop size increase is correlated with farming, which came first? shift for cultural reasons, but then you are stuck “The” demographic transition o 1798 Thomas Malthus o Fertility declines ▪ European provinces declined by 40% ▪ ▪ ● Main method of birth control coitus interruptus: pull- out complicated, multifactorial shirts in values: increasing value of nonag goods & education, survival of children, economic value of women’s time, cost for rearing children o Mortality declines: germ theory of disease, improved personal hygiene, improved nutrition (food storage and transportation), publicly organized and funded biomedical research o Increases in life expectancy ▪ India: 24 to 62 ▪ China 41 to 70 ▪ US Social Security Admin projects life expectancy to be 83 by 2080 o Contraception not new… ▪ Cyrenian coin from Libya ▪ Queen Anne’s Lace seeds o Modern fertility ▪ donor gametes ▪ assisted reproductive technology ● over 1% of all infants born in US conceived using ART Conclusions o Our lineage’s fertility has evolved over the last 5 million years. o Prior to the Neolithic, you could describe Homo sapiens as having average TFR of 4- 8 o There is no modern pop that could serve as one example of what human fertility is like t...
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This document was uploaded on 03/11/2014 for the course IB 35AC at Berkeley.

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