Offspring that are produced through sexual reproduction are usually similar, but never identical, to their parents. this is because a. half of the offspring's genes come from one parent while the other half comes from the other parent. b. genes mutate during every occurrence of sexual reproduction. c. all of the offspring's genes only come from one parent or the other. d. genes are not transferred between parents and offspring during sexual reproduction.

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

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Match with o for organic and i for inorganic for each compound