Mechanism of development was explained by
  • Hans Dietrisch
  • Spemann
  • Both a and b
  • Haemmerling
Intercalary meristems are of
  • Permanent nature
  • Temporary nature
  • Some are permanent some temporary
  • None of these
Cells of fibers and tracheids elongate during
  • Phase of cell division
  • Phase of cell elongation
  • Phase of cell maturation
  • Phase of cell differentiation
Typical plant growth shows _________ curve.
  • J-shaped
  • S-shaped
  • I-shaped
  • Parabolic
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
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
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
The stage of rapid cell division just after fertilization is
  • Organogenesis
  • Cleavage
  • Gastrulation
  • Growth
Plants grow throughout their life due to
  • presence of meristems
  • presence of vascular cambium
  • presence of xylem and phloem
  • presence of tracheids
Liver and pancreas arise from
  • Foregut
  • Midgut
  • Hindgut
  • None of these
Which one of the followings is a gaseous plant hormone?
  • Ethylene
  • Gibberellin
  • IAA
  • Abscisic acid
To prevent over – ripening, bananas should be
  • given a dip in ascorbic acid
  • maintained at room temperature
  • refrigerated
  • stored at the top of refrigerator
Growth in dorsiventral leaf is measured in terms of
  • length of leaf
  • increase in cell number
  • surface area increase
  • none of these
The ability to regain or recover the lost or injured part of body is
  • Aging
  • Regeneration
  • Abnormal development
  • Primary inductio
Which growth hormone accerlates the malting process in brewing industry?
  • Auxins
  • Gibberellins
  • Ethylene
  • Cytokinins
Which plant growth regulator is the derivative of carotenoids?
  • Auxin
  • Gibberelic acid
  • Cytokinin
  • Abscisic acid
Mobilisation of stored food in germinating seeds is triggered by
  • auxins
  • cytokinins
  • gibberellins
  • ethylene
Cavity formed between somatic and splanchnic mesoderm is called
  • Gastrocoele
  • Blastocoele
  • Coelom
  • Neurocoele
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