If two organisms are in the same phylum, then which of these statements is correct? 1. the two organisms belong to the same class 2 . the two organisms belong to the same order 3. the two organisms belong to the same kingdom

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

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity