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 Multiple Choice QuestionsMultiple Choice Questions


Assertion : On plotting the length of the root against time, a linear curve is obtained.

Reason : An elongating rout exemplifies arithmetic growth.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are hue but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


Identify the given figures A, B, C, D and E.


  •        A        B        C        D        E
    Marginal Axile Free central Parietal Basal
  •        A        B        C        D        E
    Marginal Parietal Free central Axile Basal
  •        A        B        C        D        E
    Marginal Axile Parietal Free central Basal
  •        A        B        C        D        E
    Marginal Axile Parietal Basal Free central

103. Given figure shows

  • structure of lenticel

  • hydathode showing gaseous vapour exchange

  • fungus reproducing by spore formation

  • algae reproducing by spore formation.


Cleistogamy is leading over anthesis because

  • pollination agent is not required

  • it assures heterozygosity

  • it favours insect pollination

  • it allows xenogamy


Which of the following is true?

  • Umbel is a racemose inflorescence where all stalked flower aggregate on the flat receptacle

  • Raceme is a racemose inflorescence having main axis shortened & flower born acropetally

  • Spadix is a racemose inflorescence having pendulous spike with main axis much flattened.

  • Spike is a racemose inflorescence having sessile flowers


The branched sclereids present in hydrophytes are

  • osteosclereids

  • trichosclereids

  • macrosclereids

  • astrosclereids


Cut surfaces of fruit and vegetables often become dark because

  • dirty knife makes it dark

  • oxidation of tannic acid in the presence of trace of iron from the knife makes it dark

  • dust of the air makes it dark

  • none of the above.


Ectophloic siphonostele is found in

  • Osmunda and Equisetum

  • Marsilea and Botrychium

  • Adiantum and Cucurbitaceae

  • Dicksonia and Maidenhair fern.


Composite fruit develops from

  • single ovary

  • inflorescence

  • apocaropous ovary

  • pericarp


Cocoa is the plant from which chocolate is made. Which part is used to extract it?

  • Flower

  • Fruits

  • Seeds

  • Bark