The students observed that the test tube water from the grated potato beaker was a dark blue-black color, while the chunked potato water was medium blue. What would be an appropriate hypothesis for the experiment?

A) Mechanical digestion always precedes chemical digestion.
B) If food is chewed first, then mechanical digestion will take place at a much faster rate.
C) The greater the surface area of the food exposed, the faster the rate of chemical digestion.
D) If enzyme action is represented by the iodine color change, then chemical digestion will not take place without mechanical digestion.

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

Rue or false siblings look simila rbecause they each have some traits of their parents.

What occurs to the cell during mitosis