Ais the name for all organisms that get their nutrients and energy from other organisms. a. parasite b. heterotroph c. fungi d. none of the above

Match the types of competition to their descriptions.

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

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above