Biology Forums - Study Force

Scientists estimate that twenty percent of the earth’s population consumes eighty percent of the earth’s resources. What does this imply?
 A. Eighty percent of the population has inadequate renewable resources. 
 
 B. Eighty percent of the population lives sustainably. 
 
 C. Population size is not a good measure of environmental impact. 
 
 D. Metals should replace plastics. 
 
 E. Twenty percent of the population recycles. 
 

You have a government position developing regulations to minimize global warming. Which of the following would provide the greatest contribution to global warming?
 A. Carbon dioxide. 
 
 B. Thermal pollution. 
 
 C. Sulfur oxide. 
 
 D. Methane. 
 
 E. Nitrogen dioxide. 
 

Angela is a technician monitoring signs of global warming. Which of the following should she regard as least suggestive of global warming?
 A. Rise in ocean level. 
 
 B. Increased melting of ice sheets. 
 
 C. Invasion of northern latitudes by tropical insects. 
 
 D. North temperate birds have later breeding dates. 
 
 E. Caribou migrate north earlier. 
 

Which of the following would be an example of biological magnification?
 A. Warming of the planet from a greenhouse effect that magnifies temperatures. 
 
 B. Sudden growth of algae in a lake due to an input of organic nutrients. 
 
 C. A person consuming drinking water containing lead, which cannot be excreted as fast as it is consumed. 
 
 D. The concentration of pollutants in a hawk exceed those of the fish it consumes. 
 
 E. Cutting the trees alongside a stream resulting in fish kill from removing shade and magnifying the heat from sunlight. 


Exponential growth can only occur when:
 A. a population experiences extreme competition for resources. 
 
 B. the rate of increase of the population is negative. 
 
 C. the birth rate is less than or equal to the death rate. 
 
 D. growth conditions are ideal. 


The major density dependent limiting factor in populations is:
 A. intraspecies competition. 
 
 B. parasitism. 
 
 C. weather conditions. 
 
 D. predation. 


In competing populations of organisms, genetic variations that ______________competition are favored through natural selection.
 A. Cause exponential growth 
 
 B. Reduce 
 
 C. Stay the same 
 
 D. Increase 

The first three are A,A,D respectfully.

thats what I had but I wasn't sure so thanks