Questions and Correct Answers 2025
Which ,of ,the ,following ,is ,improved ,when ,repeated ,trials ,of ,an ,experiment ,have
,consistent ,results? ,
A. ,Reliability
B. ,Validity
C. ,Independent ,Variables
D. ,Dependent ,Variables ,- ,CORRECT ,ANSWER-A. ,Reliability. ,
Reliability ,speaks ,to ,the ,repeatability ,of ,an ,experiment.
Which ,of ,the ,following ,diseases ,is ,primarily ,caused ,by ,a ,toxin ,produced ,by ,a
,microorganism? ,
A. ,Cholera
B. ,Leprosy
C. ,Acne
D. ,HIV ,- ,CORRECT ,ANSWER-A. ,Cholera ,
Diarrhea ,associated ,with ,cholera ,is ,caused ,by ,cholera ,toxin ,secreted ,by ,certain
,strains ,of ,the ,bacterium ,vibrio ,cholerae.
A ,student ,wants ,to ,design ,an ,experiment ,to ,demonstrate ,the ,effects ,of ,acid
,rain ,on ,plant ,life. ,Which ,of ,the ,following ,substances ,should ,be ,combined ,with
,water ,to ,stimulate ,acid ,rain? ,
A. ,Vinegar
B. ,Table ,salt
C. ,Baking ,soda
D. ,Ammonia ,- ,CORRECT ,ANSWER-A. ,Vinegar ,
Vinegar ,is ,acidic, ,with ,a ,pH ,less ,than ,7. ,Adding ,it ,to ,the ,water ,will ,acidify ,water
,to ,stimulate ,acid ,rain.
Which ,of ,the ,following ,compounds ,is ,an ,ionic ,compound? ,
, A. ,PCl3
B. ,H2O
C. ,MgF2
D. ,NH3 ,- ,CORRECT ,ANSWER-C. ,MgF2
Each ,magnesium ,(valence ,= ,2) ,atom ,transfers ,one ,electron ,to ,each ,of ,the
,fluorine ,(valence ,= ,7) ,atoms, ,forming ,ionic ,bonds. ,Molecules ,formed ,by ,the
,transfer ,of ,electrons ,are ,called ,ionic ,compounds.
Which ,of ,the ,following ,is ,a ,function ,of ,a ,somatic ,reflex? ,
A. ,It ,helps ,to ,produce ,an ,involuntary ,response ,in ,the ,absence ,of ,a ,stimulus. ,
B. ,It ,helps ,to ,produce ,a ,response ,quickly ,to ,protect ,the ,body ,from ,harm. ,
C. ,It ,helps ,to ,produce ,variable ,responses ,to ,the ,same ,sensory ,input. ,
D. ,It ,helps ,the ,individual ,to ,produce ,an ,appropriate ,voluntary ,response. ,-
,CORRECT ,ANSWER-B. ,It ,helps ,to ,produce ,a ,response ,quickly ,to ,protect ,the
,body ,from ,harm. ,
Reflex ,actions ,are ,involuntary, ,stereotyped, ,and ,predictable, ,as ,they ,require ,the
,body ,to ,respond ,quickly ,to ,a ,specific ,sensory ,input ,to ,protect ,the ,body.
After ,doing ,a ,belly ,flop ,into ,a ,swimming ,pool, ,a ,child ,says, ,"The ,water ,slapped
,me." ,Which ,of ,the ,following ,is ,the ,property ,of ,water ,that ,causes ,the ,slap?
A. ,Irregular ,expansion
B. ,Hydrogen ,bonding
C. ,Capillary ,action
D. ,Hydrophobic ,exclusion ,- ,CORRECT ,ANSWER-B. ,Hydrogen ,bonding ,
Hydrogen ,bonding ,holds ,the ,water ,molecules ,tightly ,together ,so ,they ,cannot
,disperse ,easily, ,increasing ,surface ,tension ,and ,causing ,the ,slap.
Which ,of ,the ,following ,is ,an ,example ,of ,a ,long ,bone?
A. ,Vertebra
B. ,Sacrum
C. ,Ribs
D. ,Femur ,- ,CORRECT ,ANSWER-D. ,Femur ,
The ,femur ,is ,the ,long ,bone ,of ,the ,thigh. ,Long ,bones ,have ,a ,compact, ,hollow
,shaft ,containing ,marrow. ,The ,ends ,of ,the ,bone ,are ,spongy.
Which ,of ,the ,following ,statements ,describes ,an ,ion ,of ,the ,isotope ,Aluminum-
27?