Knight followed up on attempts of English farmers to improve varieties of agriculture with his studies on garden peas. When he crossed two true-breeding varieties, he found all of the following: List the letters of all that apply.
a. All the F1 offspring had the dominant trait.
b. If both parents have the same trait, then all of their offspring will also have that trait.
c. Some F2 offspring had the dominant trait and some had the recessive trait.
d. Among the F2 offspring, more had the dominant trait and fewer had the recessive trait.

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

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?