Chapter 24

Which of the following is an example of a density-dependent regulating factor? a. earthquake b. starvation c. flood d. drought

If a population reaches the carrying capacity of the environment, a. unrestrained growth will occur. b. the population will decline rapidly. c. food and other resources will increase. d. the population size will fluctuate around this level.

The ozone layer of the atmosphere absorbs a. carbon dioxide. b. chlorine. c. nitrogen dioxide. d. ultraviolet radiation.

An ecological footprint measures a. the number of people who can live in an area. b. the amount of natural resources used by each person in an area. c. the rate of population growth in an area d. the degree of habitat destruction in an area.

Which pollutant is responsible for the hole in the ozone layer? a. carbon dioxide b. methane c. chlorofluorocarbon (CFC) d. sulfur dioxide

Which of the following is the primary reason for the decline in the population of bluefin tuna? a. overfishing b. radiation from nuclear disasters c. dams preventing the tuna from swimming upstream d. reduction in the tuna's food supply due to global warming

Choose the incorrect statement about water use. a. Indirect water use is greater than direct water use. b. Irrigation is responsible for a great deal of water use. c. Water use is greater in less developed countries. d. A water footprint is a measure of water use.

Which of the following is caused by heavy irrigation? a. salinization b. global climate change c. drought d. none of the above