Ecology unit II quiz

unitIIassignmentpartI.docx

Human population growth ____________.

		is about the same worldwide
		tends to exhibit a J-shaped curve (exponential growth) in economically underdeveloped countries
		is increasing rapidly in Europe
		is declining overall

Which of the following scenarios would exemplify a density-dependent population regulation factor?

		European starlings using nesting sites that would otherwise be used by woodpeckers
		A flood inundating the nests of burrowing animals
		A Florida orange crop ruined by freezing weather
		Dinosaurs going extinct after an asteroid strike

Of the three types of general survivorship curves, which can be most likely expected to live closest to its maximum life expectancy?

How many years did it take for the world's population to go from one billion to two billion?

An age structure diagram that is very wide on the bottom and tightly pyramid shaped is an indication of:

		negative growth.
		stabilized growth.
		a predominantly aging population.
		rapid growth.

Which of the following scenarios would exemplify a density-independent population regulation factor?

		Rainbow smelt introduced into Lake Winnipeg competing with the native emerald shiners for food
		Boll weevils destroying a cotton crop
		A stomach flu outbreak in New York City
		A drought in West Texas that dries up ponds, lakes, and streams

Which is TRUE of K-selected species?

		They produce many offspring.
		They tend to be small organisms.
		They provide long-term care for young.
		They mature early.

How many years did it take for the world's population to go from one billion to 4 billion?