A seismograph has a heavy weight that is hung from a spring. What would happen if the weight were attached to a rod instead of a spring? There is more than one answer

A. The weight would not oscillate.

b. The weight would oscillate.

c. The pen would not make contact with the paper.

d. The seismograph would not be accurate.

e. The seismograph would not function.

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

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.