A halocline is a boundary between changing regions of which of the following properties?
sound velocity

temperature

salinity

density

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

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?