GGR329H5 Study Guide - Final Guide: Vaclav Smil, Measles Vaccine, Guenter Lewy
Document Summary
>available root crops were limiting for calories as well as for protein. East-west continental axis is more preferable as localities distributed east and west of eachother at the same latitude share the same day length and seasonal variations. Thus west-east axis allowed fertile crescent crops quickly to launch agriculture over the band of temperate latitudes from ireland to the indus valley, and to enrich the agriculture that arose independently in eastern asia. >wait for their hosts to be eaten by other hosts (eg. salmonella bacteria in meat) >hitchhike in the saliva of an insect that bites the old host and flies off to find a new host (mosquitoes) >pass from a woman to her fetus, infected baby already at birth (aids) >spread quickly and efficiently from infected person to nearby healthy people, with result that entire population gets exposed within short period of time. >they"re acute illnesses: within a short time, you either die or completely recover.
