CBSE  /  Class 11  /  Biology  /  Plant Growth and Development

  • 1. 
    Which one of the followings is a gaseous plant hormone?

  • Ethylene
  • Gibberellin
  • IAA
  • Abscisic acid

  • 2. 
    To prevent over – ripening, bananas should be

  • given a dip in ascorbic acid
  • maintained at room temperature
  • refrigerated
  • stored at the top of refrigerator

  • 3. 
    Growth in dorsiventral leaf is measured in terms of

  • length of leaf
  • increase in cell number
  • surface area increase
  • none of these

  • 4. 
    Mechanism of development was explained by

  • Hans Dietrisch
  • Spemann
  • Both a and b
  • Haemmerling

  • 5. 
    The ability to regain or recover the lost or injured part of body is

  • Aging
  • Regeneration
  • Abnormal development
  • Primary inductio

  • 6. 
    Which growth hormone accerlates the malting process in brewing industry?

  • Auxins
  • Gibberellins
  • Ethylene
  • Cytokinins

  • 7. 
    Which plant growth regulator is the derivative of carotenoids?

  • Auxin
  • Gibberelic acid
  • Cytokinin
  • Abscisic acid

  • 8. 
    Typical plant growth shows _________ curve.

  • J-shaped
  • S-shaped
  • I-shaped
  • Parabolic

  • 9. 
    Mobilisation of stored food in germinating seeds is triggered by

  • auxins
  • cytokinins
  • gibberellins
  • ethylene

  • 10. 
    Cavity formed between somatic and splanchnic mesoderm is called

  • Gastrocoele
  • Blastocoele
  • Coelom
  • Neurocoele
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