Playing the piano requires activation of muscles of the upper limbs, neck and back. to play the keys, the fingers must generate rapid, small movements that vary in force generation to play the keys sometimes very hard (larger amounts of force) and sometimes very soft (very little amounts of force), and everything in between. the elbow flexors hold the elbow joint at the same comfortable angle throughout the duration of play, which can last several hours. additionally, the player must also sit upright at the piano bench for these long durations without the back or neck muscles fatiguing. a. lactic acid is produced because no oxygen is available to the muscle cell. b. lactic acid is made when atp demands exceed oxygen availability in the cell. c. lactic acid is a byproduct of creatine phosphate production. d. lactic acid is made when there is insufficient glucose in an active cell

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map.b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials