apes fin
At the current rate of growth, Earth's human population will double in about 50 years. Which of the following is the LEAST viable strategy for ensuring adequate nutrition for a population of this size?
Doubling the area of arable land on a global basis
Which of the following methods of agricultural irrigation results in the loss of the least amount of water by evaporation?
Drop irrigation
what is true about genetic diversity
Genetic resistance to pests and diseases can be increased by crossing a crop plant with ancestral varieties.
What is likely to minimize soil erosion?
No-till agriculture
An integrated pest-management approach to pest control emphasizes what?
Reduction of crop damage to an economically tolerable level
Which of the following is most likely to increase both the nutrient levels and the bacterial content of lake water?
Runoff from a nearby hog farm
The presence of fecal coliform bacteria in a sample of river water suggests which of the following?
The water is contaminated with animal waste.
Which of the following best explains why the maximum sustainable yield for ocean fisheries has been exceeded?
Too many fish of reproductive age are harvested.
Compared with people in developing countries, people in industrialized countries are more likely to eat...
beef
The presence of high levels of fecal coliform bacteria in a water source indicates that the water
contains too little oxygen to support fish life
Overgrazing of grasslands can lead to reduced range quality. Two of the major effects of overgrazing are
erosion and desertification
Factors contributing to the rise in world hunger include all of the following EXCEPT
increasing consumption of vegetable protein in place of meat protein
The major cause for the decline in the worldwide catch of fish since 1990 is...
overfishing
When a rain forest is slashed and burned, the local concentration of carbon dioxide in the atmosphere increases. This is primarily due to..
oxidation of carbon compounds
