How is quartz sandstone metamorphosed into quartzite during contact metamorphism?
What will be an ideal response?
Sand grains are fused together because of high temperatures.
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Which of the following is known to cause discolored enamel of the teeth?
a. Excessive fluoride in the water b. Insufficient fluoride in the water c. Excessive intake of simple sugars d. Inability of the body to absorb fluoride
Craig is a college junior who is on the college cross-country team. He has been training hard to make the top seven runners. He feels comfortable with his training plan but is confused about how to nourish his body to maximize his performance in daily practice runs, time trials, and competitions. He has found it difficult to eat enough throughout his busy school day and at the same time eat the
right foods that don't upset his stomach. Craig makes an appointment with a registered dietitian to learn what he can do to improve his competitive edge. In the first appointment with the dietitian Craig goes over his typical dietary intake for the week. He discovers that he is not eating enough before or after his workouts and that this is the likely reason he is not recovering between workouts. He also has his body fat and body water measured. The dietitian discovers that his body water is low, which means he is dehydrated, and that his body fat percentage is 2.5%. If Craig's team trains at 3 p. m., what time should he plan to eat his pre-workout meal? A) Between 6 and 7 a.m. B) Between 9 and 10 a.m. C) Between 11 a.m. and 12 p.m. D) Between 1 and 2 p.m.
Severe fat restriction among older adults may lead to _____
a. nutrient deficiencies b. weight gain c. greater risk of cancer d. dehydration e. depression
The point of entry for an amino acid into the Krebs cycle is determined by its:
a. nitrogen content. b. caloric content. c. potential to produce ammonia. d. structure.