Biology MCQs

Page No. 105

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


aHydrogen bonding

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bTranspiration

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cAdhesion

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dRoot prerssure

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View Answer Transpiration

An infectious disorder of respiratory system is_________________?


aCancer

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bAsthma

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cTuberculosis

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dEmphysema

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View Answer Tuberculosis

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


aParenchyma

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bCompanion cell

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cTracheid

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dSieve element

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View Answer Sieve element

95% of the cytoplasm of RBCs is____________?


aHemoglobin

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bEnzymes

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cSalts

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dOther proteins

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View Answer Hemoglobin

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


aMitosis

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bReplication

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cCloning

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dBiological control

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View Answer Cloning

An antibody is made of _________ polypeptide chains?


a1

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b2

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c3

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d4

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View Answer 4

______________ of earth surface is covered with water?


a10%

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b30%

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c75%

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d90%

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View Answer 75%

Gaseous exchange in birds occurs at level of_______________?


aAlveoli

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bAir sacs

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cBronchi

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dParabronchi

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View Answer Parabronchi

Animals of which class of arthropoda are present everywhere_____________?


aCrustacean

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bInsecta

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cArachnida

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dMyriapoda

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View Answer Insecta

Red to orange pigments are_____________?


aCarotenes

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bCarotenoids

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cXanthophylls

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dChlorophyll

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View Answer Carotenes

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