In the lower Tigris-Euphrates Valley, __________________p oisoned the fields once farmed by Ubaidians and Sumerians.
a. the Black Death
b. Neolithic herders
c. severe soil erosion
d. high levels of salts
e. animal grazing
Question 2
The archaeological record indicates Paleolithic individuals were capable of expanding into new habitats,
a. but their population density remained low.
b. but they did not adapt culturally.
c. but they did not adapt biologically.
d. but they had a measurable environmental impact.
e. but they did not spread out of Africa.
The tiger, Panthera tigris, was historically found throughout much of Asia, but at low population de
Impacts of glaciers on landscapes can be seen as (a) a U-shaped valley in Labrador, (b) a drumlin fi
Feral horses in Tule Valley, Utah
The original Magdeburg hemispheres (lower left) used to demonstrate Otto von Guericke's vacuum
Types of paralysis: (A) Quadriplegia is complete or partial paralysis of the upper extremities and c
Lower extremity blood pressure cuff