Describe and discuss the use of biological control for battling pests
What will be an ideal response?
This strategy uses predators and pathogens, 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 chemical sprays at the same time.
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What is the main tenet of the lock-and-key model for drug activity?
A. The biological lock of an enzyme can be activated by using certain chemical keys. B. The key to a drug's success is to keep it locked away from stomach acid. C. Only certain biological keys can unlock the potential of a drug. D. There is a connection between drug structure and drug shape. E. all of the above
Barrier islands migrate landward
Indicate whether the statement is true or false
The program Reducing Emissions from Deforestation and Forest Degradation (REDD) ________
A) seeks to reduce the 30% of global carbon emissions caused by primary forests B) gives wealthy nations carbon-offsets if they pay poorer nations to conserve forests C) supports research to develop trees which permanently sequester carbon D) combats unsustainable forestry practices through controlled burning programs E) was passed unanimously by the Copenhagen Conference (2010 ) on global climate change
Crater Lake in Oregon occupies a(n) ____
a. graben b. caldera c. syncline d. anticline e. fissure