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1			What event triggered the explosive growth of the world's human population at point "A"?
			A)	advent of multiple birth pregnancy in a high proportion of the population
			B)	significant medical advances through science and technology
			C)	the industrial revolution in the 1700s
			D)	the discovery of penicillin
2			What event triggered the second phase of explosive growth of the world's human population at point "B"?
			A)	advent of multiple birth pregnancy in a high proportion of the population
			B)	significant medical advances through science and technology
			C)	the industrial revolution in the 1700s
			D)	the discovery of penicillin

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3			Why does Kenya's population pyramid have a much broader base than does the population pyramid for the United States?
			A)	Kenya has a higher per capita birth rate.
			B)	Kenya has more individuals below child bearing age.
			C)	The United States is comprised proportionately of older individuals.
			D)	All of these are correct.
4			The pyramid for the United States is nearly straight up and down except for a bulge in the middle. What is this bulge due to?
			A)	high disease rate in individuals younger than this region of the pyramid
			B)	influx of immigrants
			C)	post-World War II baby boom
			D)	high death rate due to cancer and heart disease in older individuals makes the pyramid appear to have a bulge

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5			What appears to be the factor that limits the population size of the prey (snowshoe hare)?
			A)	food availability
			B)	number of predators
			C)	disease
			D)	living space
6			What appears to be the factor that limits the population size of the predator (lynx)?
			A)	food availability
			B)	disease
			C)	living space
			D)	snow cycles