Chapter Questions
The number of individuals that can be sustained indefinitely by the resources in a given region is the _____.a. biotic potentialb. carrying capacityc. environmental resistanced. density-dependent control
_____shields organisms against the sun's UV wavelengths.a. A thermal inversionb. Acid rainc. The ozone layerd. The greenhouse effect
Acid rain is one outcome of _____.a. coal burningb. gas and oil burningc. some industrial processesd. all of the above
Greenhouse gases _____.a. slow the escape of heat from Earth into spaceb. are produced by natural and human activitiesc. are at higher levels than they were 100 years agod. all of the above
All the following are renewable energy sources except _____.a. hydropowerb. windc. natural gasd. solar energy
Earth's biodiversity is threatened mainly by _____.a. the spread of disease organisms due to climate changeb. habitat destruction by human activitiesc. disasters such as wildfires and hurricanesd. water pollutione. all of the above