The following is the photosynthesis equation. use the drop-down menu to balance the equation:

? co2 + ? h2o -> ? c6h12o6 + ? o2

hint: use 1 to keep the compound the same.

options are 1, 3, 6, and 9

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Several billion years ago which gas was the least prevailant in the atmosphere

Every early childhood education program should develop a