Describe the use of biological control for battling pests
What will be an ideal response?
This strategy uses predators, pathogens, and parasitoids of crop pests rather than chemicals to control pest densities. An organism that eats a crop pest is released into a crop; it kills the crop pest, decreasing the density of the crop pest without chemicals. The fact that many biocontrol agents are functioning parts of the ecosystem's food web greatly reduces the chances of pests becoming resistant to a predator or disease vector. It goes without saying that biological control of this type precludes using pesticides at the same time.
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This technology was able to assist governments and aid agencies in the aftermath of the 2004 Indian Ocean tsunami.
A. magnetic compass B. sextant C. ground photography D. GIS
The biggest problem with invasive species is that in the new location, they ____.
A. are always bigger than native species B. have no population controls such as predators C. are always stronger than native species D. have higher reproductive rates than native species E. evolve more quickly than native species
Dry deposition occurs when ____.
A. pollution levels are low B. acidic particulates fall to the ground C. pollutants are released in cold air D. pollution travels a large distance from its source E. acidic snow, rain, or fog reaches the ground
What does ozone in the stratosphere protect us from?
A. sunlight B. infrared radiation C. x-ray radiation D. ultraviolet (UV) radiation E. lightning