Whichvbofvbthevbfollowingvbisvbimprovedvbwhenvbrepeatedvbtrialsvbofvbanvbexperimentvbha
vevbconsistentvbresults?vb
A.vbReliability
B.vbValidity
C.vbIndependentvbVariables
D.vbDependentvbVariablesvb-vbanswer--A.vbReliability.vb
Reliabilityvbspeaksvbtovbthevbrepeatabilityvbofvbanvbexperiment.
Whichvbofvbthevbfollowingvbdiseasesvbisvbprimarilyvbcausedvbbyvbavbtoxinvbproducedvbbyvb
avbmicroorganism?vb
A.vbCholera
B.vbLeprosy
C.vbAcne
D.vbHIVvb-vbanswer--A.vbCholeravb
Diarrheavbassociatedvbwithvbcholeravbisvbcausedvbbyvbcholeravbtoxinvbsecretedvbbyvbcert
ainvbstrainsvbofvbthevbbacteriumvbvibriovbcholerae.
Avbstudentvbwantsvbtovbdesignvbanvbexperimentvbtovbdemonstratevbthevbeffectsvbofvbacidv
brainvbonvbplantvblife.vbWhichvbofvbthevbfollowingvbsubstancesvbshouldvbbevbcombinedvbwi
thvbwatervbtovbstimulatevbacidvbrain?vb
A.vbVinegar
B.vbTablevbsalt
C.vbBakingvbsoda
D.vbAmmoniavb-vbanswer--A.vbVinegarvb
Vinegarvbisvbacidic,vbwithvbavbpHvblessvbthanvb7.vbAddingvbitvbtovbthevbwatervbwillvbacidifyvb
watervbtovbstimulatevbacidvbrain.
Whichvbofvbthevbfollowingvbcompoundsvbisvbanvbionicvbcompound?vb
A.vbPCl3
B.vbH2O
C.vbMgF2
D.vbNH3vb-vbanswer--C.vbMgF2
Eachvbmagnesiumvb(valencevb=vb2)vbatomvbtransfersvbonevbelectronvbtovbeachvbofvbthevbf
luorinevb(valencevb=vb7)vbatoms,vbformingvbionicvbbonds.vbMoleculesvbformedvbbyvbthevbt
ransfervbofvbelectronsvbarevbcalledvbionicvbcompounds.
, Whichvbofvbthevbfollowingvbisvbavbfunctionvbofvbavbsomaticvbreflex?vb
A.vbItvbhelpsvbtovbproducevbanvbinvoluntaryvbresponsevbinvbthevbabsencevbofvbavbstimulus
.vb
B.vbItvbhelpsvbtovbproducevbavbresponsevbquicklyvbtovbprotectvbthevbbodyvbfromvbharm.vb
C.vbItvbhelpsvbtovbproducevbvariablevbresponsesvbtovbthevbsamevbsensoryvbinput.vb
D.vbItvbhelpsvbthevbindividualvbtovbproducevbanvbappropriatevbvoluntaryvbresponse.vb-
vbanswer--
B.vbItvbhelpsvbtovbproducevbavbresponsevbquicklyvbtovbprotectvbthevbbodyvbfromvbharm.vb
Reflexvbactionsvbarevbinvoluntary,vbstereotyped,vbandvbpredictable,vbasvbtheyvbrequirevbt
hevbbodyvbtovbrespondvbquicklyvbtovbavbspecificvbsensoryvbinputvbtovbprotectvbthevbbody.
Aftervbdoingvbavbbellyvbflopvbintovbavbswimmingvbpool,vbavbchildvbsays,vb"Thevbwatervbslap
pedvbme."vbWhichvbofvbthevbfollowingvbisvbthevbpropertyvbofvbwatervbthatvbcausesvbthevbsl
ap?
A.vbIrregularvbexpansion
B.vbHydrogenvbbonding
C.vbCapillaryvbaction
D.vbHydrophobicvbexclusionvb-vbanswer--B.vbHydrogenvbbondingvb
Hydrogenvbbondingvbholdsvbthevbwatervbmoleculesvbtightlyvbtogethervbsovbtheyvbcannotv
bdispersevbeasily,vbincreasingvbsurfacevbtensionvbandvbcausingvbthevbslap.
Whichvbofvbthevbfollowingvbisvbanvbexamplevbofvbavblongvbbone?
A.vbVertebra
B.vbSacrum
C.vbRibs
D.vbFemurvb-vbanswer--D.vbFemurvb
Thevbfemurvbisvbthevblongvbbonevbofvbthevbthigh.vbLongvbbonesvbhavevbavbcompact,vbholl
owvbshaftvbcontainingvbmarrow.vbThevbendsvbofvbthevbbonevbarevbspongy.
WhichvbofvbthevbfollowingvbstatementsvbdescribesvbanvbionvbofvbthevbisotopevbAluminum-
27?
A.vbThevbionvbhasvb13vbneutrons
B.vbThevbatomvbhasvbavbmassvbnumbervbofvb14
C.vbThevbatomvbhasvb27vbelectrons
D.vbThevbionvbhasvbanvbelectricvbchargevbofvb+3vb-vbanswer--
D.vbThevbionvbhasvbanvbelectricvbchargevbofvb+3
Thevbionvbcontainsvb13vbprotonsvbandvb10vbelectrons.vbLosingvbthreevbelectronsvbwillvbgi
vevbthevbionvbavbchargevbofvb+3.vbThevbmassvbnumbervb(27)vbisvbthevbsumvbofvbprotonsvba
ndvbneutrons.
Whichvbofvbthevbfollowingvbcorrectlyvbdescribesvbthevbcolorvbchangevbandvbsubstancevbp
ropertiesvbforvbacid-basevbindicatorvbtesting?