Cells secrete acids and bases to maintain the proper pH for enzymes to work, and enzyme systems efficiency is pH dependant. Given these facts, cells secrete acids and bases to maintain enzyme systems what among the following options: - breakdown - failure - efficiency - it needs them - kinetic - health - distractions - state
efficiency

When the body is hot , sweat is produced to cool the body, and humans use evaporation of water, sweat, to cool their bodies. Given these facts, what is used to cool the body among the following options: - vaporization - exercise - Animal fur - magnetism - Solar energy - dry and hot - sun - evaporation
evaporation

Faulting of rock in Earth 's crust causes earthquakes, and earthquakes and tremors are common in Yellowstone. Given these facts, faulting of rock in Earth 's crust causes what among the following options: - friction - conversion - mitosis - loose soil - tremors - Movement - crust - waves
tremors