The "hygiene hypothesis" proposes that
A. lack of exposure to microbes can promote development of allergies.
B. cleanliness truly is next to godliness.
C. hand washing is the best preventative measure against infection.
D. the immune system develops best in a clean environment.
A
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Which of the following can be used to isolate pure cultures of bacteria from mixtures?
A. Streak plates B. Pour plates C. Spread plates D. All of the choices are correct.
Explain why mice are appropriate animal models for human behavioral genetics researc What will be an ideal response?
Why are stem cells important?
A) They have specialized DNA. B) They are incapable of becoming cancer cells. C) They have the potential to undergo cell division. D) They have the potential to develop into other cell types.
What type of exteroceptors are located in the ear?
A. chemoreceptors B. photoreceptors C. mechanoreceptors D. thermoreceptors E. none of these