Johnny is a forensic scientist. he tests for gunshot residue. which of the following tests might johnny use?

johnny uses the test, which should turn the material red if gunshot residue is present. for another item, he only has a small amount of material to test, so he chooses which is known to return conclusive results even on very small amounts.

a. dermal nitrate
b. sem-edx
c. griess reagent

a. dermal nitrate
b. sem-edx
c. griess reagent

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

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

How can active reading strategies you? o a. they can you get into better physical shape. o b. they can you read fewer science articles. o c. they can you understand what you read. o d. they can you avoid reading altogether.