Which statement best defines an air pressure gradient? the change in air pressure between two air masses
the different air movement north and south of the equator
the friction that slows down winds near the earth's surface
the rotation of the earth on its axis

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

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

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?