Which of the following is used to sterilize items that should not, or cannot, be exposed to heat or water?
A. ethylene oxide
B. formaldehyde
C. hydrogen peroxide
D. calcium hypochlorite
E. triclosan
Answer: A
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As plants invaded the land, all of the following were true EXCEPT
A. there was a greater availability of light for photosynthesis. B. there was an increased threat of desiccation of unprotected cells. C. there was an increased threat from predation by animals. D. there was a greater concentration of carbon dioxide available in the atmosphere.
Irrigation can cause salt to accumulate in the soil, a process known as:
a. erosion. b. decomposition. c. mineralization. d. salinization. e. weathering.
Golden Rice is golden in color because it is rich in
A) vitamin A. B) vitamin C. C) beta-carotene.
Using traditional cross-breeding techniques, scientists have been able to create featherless chickens. Which situation has not been a problem with featherless chickens?
A) Featherless chickens are unusually vulnerable to mosquito attacks. B) Featherless chickens are unusually vulnerable to parasites. C) Featherless chickens have difficulty mating. D) Featherless chickens are ultra-sensitive to sunlight. E) Featherless chickens have trouble digesting corn.