This is my last question for the day.

What is the secondary consumer in this energy pyramid?

A. snakes

B. grasshoppers

C. mice

D. grasses

E. none of the above

Why should the united state be concerned about air pollution in china?

What do scientists need to look at before developing an argument

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