Desertification Can Occur from Over Grazing and Over Use of Ground

question 12

Multiple Choice

Desertification can occur from over grazing and over use of ground water.An example was the dust bowl during the 1930s in parts of the Great Plains of the United States.Which of the following could best explain this observation?

• A)Deserts only form when rainfall levels drop for hundreds of years
• B)Desert plants don't need water to survive
• C)Desert plants cannot be eaten by herbivores
• D)When grassland plants become dry herbivores will no longer eat them
• E)Grassland plants cannot survive if water levels drop

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Definitions:

Rich Democracies

Countries characterized by high levels of economic development, wealth, and democratic governance.

Organ Reserve

The capacity of organs to allow the body to cope with stress, via extra, unused functioning ability.

Homeostasis

The adjustment of all of the body’s systems to keep physiological functions in a state of equilibrium. As the body ages, it takes longer for these homeostatic adjustments to occur, so it becomes harder for older bodies to adapt to stress.

Senescence

The gradual deterioration of functional characteristics that occurs with aging in biological organisms.