Earth's geochemical cycles remove and add materials, such as water and rock. the three main, interconnected geochemical cycles of earth are a) water, rock, and tectonic cycles b) water, rock, and carbon cycles c) water, tectonic, and nitrogen cycles d) rock, tectonic, and volcanic cycles

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

All ova contain sex chromosomes corresponding to: x y xx xy

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere