CBSE  /  Class 11  /  Biology  /  Plant Growth and Development

  • 1. 
    Mechanism of development was explained by

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

  • 2. 
    Intercalary meristems are of

  • Permanent nature
  • Temporary nature
  • Some are permanent some temporary
  • None of these

  • 3. 
    Cells of fibers and tracheids elongate during

  • Phase of cell division
  • Phase of cell elongation
  • Phase of cell maturation
  • Phase of cell differentiation

  • 4. 
    Typical plant growth shows _________ curve.

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

  • 5. 
    Exponential growth of the plants is express as W

  • ability of the plant to produce new cells
  • efficiency index
  • relative growth rate
  • all of the above

  • 6. 
    Opening of floral buds into flowers, is a type of:

  • Autonomic movement of variation
  • Autonomic movement of locomotion
  • Autonomic movement of growth
  • Paratonic movement of growth

  • 7. 
    Which one is incorrect?

  • Epiblast is presumptive ectoderm and mesoderm
  • Hypoblast is presumptive endoderm
  • Hypoblast is presumptive mesoderm
  • Upper layer of cells in blastoderm is epiblast

  • 8. 
    The stage of rapid cell division just after fertilization is

  • Organogenesis
  • Cleavage
  • Gastrulation
  • Growth

  • 9. 
    Plants grow throughout their life due to

  • presence of meristems
  • presence of vascular cambium
  • presence of xylem and phloem
  • presence of tracheids

  • 10. 
    Liver and pancreas arise from

  • Foregut
  • Midgut
  • Hindgut
  • None of these
Report Question
warning
Practice More On Plant Growth and Development
Quiz 1 Quiz 2
access_time
  Time