1:   Hormone which stimulate intiation of flowering process is :
Options:
  1. Gibberellin
  2. Vernalin
  3. Ethylene
  4. Florigen

Answer: Option 4

Explanation:

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2:   Low temperature treatment to speed up the process of flowering is referred to as
Options:
  1. photoperiodism
  2. vernalization
  3. thermoperiodism
  4. hydroponics

Answer: Option 2

Explanation:

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3:   Bolting i.e. internode elongation just prior to flowering in beet, cabbage and many rosette plants, is promoted by
Options:
  1. auxins
  2. gibberellins
  3. cytokinins
  4. Ethylene

Answer: Option 2

Explanation:

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4:   Kinetin, a modified form of adenine was discovered from
Options:
  1. autoclaved herring sperm DNA
  2. corn kernel
  3. Coconut milk
  4. Fungus

Answer: Option 1

Explanation:

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5:   Which of the following physiological effects is caused in plants by gibberellic acid ?
Options:
  1. Shortening of genetically tall plants
  2. Elongation of genetically dwarf plants
  3. Rooting in stem cuttings
  4. Yelowing of young leaves

Answer: Option 2

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6:   Cytokinins are mostly
Options:
  1. Glucosides
  2. phenolics
  3. amino purines
  4. Organic acid

Answer: Option 3

Explanation:

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7:   The phenomenon of apical dominance can be overcome by exogenous application of
Options:
  1. auxins
  2. gibberellins
  3. cytokinins
  4. Ethylene

Answer: Option 3

Explanation:

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8:   Decapitation i.e. removal of shoot tips in a plant usually results in
Options:
  1. inactivation of lateral buds
  2. growth of lateral buds
  3. cessation of plant growth
  4. yellowing of leaves

Answer: Option 2

Explanation:

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9:   Which of the following hormones is used in root formation on stem cuttings ?
Options:
  1. Kinetin
  2. IBA
  3. GA
  4. ABA

Answer: Option 2

Explanation:

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10:   1Cells of tracheary elements (tracheids and vessels) become dead at maturity and lose their protoplasmdue to the deposition of lignocellulosic cell wall thickenings. This is an example of
Options:
  1. Growth
  2. differentiation
  3. dedifferentiation
  4. redifferentiation

Answer: Option 2

Explanation:

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