How does the information about chemical reactions given in chapter 2 relate to solutions? how can understanding chemical reactions and solutions scientists discover more about the world we live in?

Which layer of the eye completely surrounds the eye except for a dark, round opening called the pupil? a. sclerab. corneac. retinad. choroidthe answer is a sclera

1. beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. for each time point in the cycle you select, state the following: • whether the atria and ventricles are contracting or relaxing • whether the av valves and semilunar valves are closed or open • whether the pressure in the atria and ventricles is high or low

Which ocean movement do power plants use to produce usable energy? a. currents b. drifts c. tides d. tsunamis