Astudent observed blood cells under a microscope.
a scale drawing of one of the cells is shown in figure 1.
grade
(4-6
figure 1
a
in figure 1, a is the image width. the real width of the cell is 0.012 mm.
what is the magnification of the image? use the formula:
size of image
magnification=1
size of real object
magnification = x

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

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 law of dominance, we would expect percent of the offspring from this cross to have large teeth.