ATP is required during muscle contraction because ATP allows myosin heads to
A. pivot and pull on actin.
B. bind to actin.
C. recock.
D. release actin.
Answer: D
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A. Decrease in education B. Decrease in average marrying age C. Decrease in sanitation D. Decrease in infant mortality rate E. Decrease in affluence
What extraction process involves setting off explosive charges to create cracks deep in rock and then pumping a mixture of water, sand, and chemicals into the cracks?
A. liquid extraction B. solar conversion C. vertical drilling D. hydraulic fracturing E. horizontal drilling
Which was found to be the most economical approach to protect drinking water sources for New York City?
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Sedimentary layers in which grain size decreases from bottom to top are called graded beds. Indicate whether the statement is true or false