Biology MCQs

Page No. 105

According to cohesion-tension theory, tension is created by__________________?


aHydrogen bonding


bTranspiration


cAdhesion


dRoot prerssure


View Answer Transpiration

An infectious disorder of respiratory system is_________________?


aCancer


bAsthma


cTuberculosis


dEmphysema


View Answer Tuberculosis

_________________ cells of phloem are directly involved in transport of organic solutes?


aParenchyma


bCompanion cell


cTracheid


dSieve element


View Answer Sieve element

95% of the cytoplasm of RBCs is____________?


aHemoglobin


bEnzymes


cSalts


dOther proteins


View Answer Hemoglobin

Production of genetically identical copies of organisms/cells by asexual reproduction is called__________?


aMitosis


bReplication


cCloning


dBiological control


View Answer Cloning

An antibody is made of _________ polypeptide chains?


a1


b2


c3


d4


View Answer 4

______________ of earth surface is covered with water?


a10%


b30%


c75%


d90%


View Answer 75%

Gaseous exchange in birds occurs at level of_______________?


aAlveoli


bAir sacs


cBronchi


dParabronchi


View Answer Parabronchi

Animals of which class of arthropoda are present everywhere_____________?


aCrustacean


bInsecta


cArachnida


dMyriapoda


View Answer Insecta

Red to orange pigments are_____________?


aCarotenes


bCarotenoids


cXanthophylls


dChlorophyll


View Answer Carotenes

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