Multiple Choice QuestionsWhich one is a short day plant?
Brassica campestris
Raphanus sativus
Glycine max
Papaver somniferum
The synthetic hormone used as a weedicide is
Indole 3-acetic acid
gibberellic acid
2, 4- D
Indole butyric acid
C.
2, 4- D
High concentration of synthetic auxins such as 2, 4- D or 2, 4- Dichlorophenoxyacetic acid and 2, 4- T or 2, 4- Trichlorophenoxy acetic acid helps in destroying the dicot seeds.
Natural auxins are IAA or Indole 3-acetic acid and IBA or Indole butyric acid.
First natural cytokinin was discovered by :
Skoog and Miller
Letham
Benson and Calvin
Thimann and Went
Which hormone is responsible for mobilization of storage food during seed germination ?
Auxin
Gibberellin
Cytokinin
Ethylene
Induction of flowering by low temperature in plants is
cryobiology
vernalization
phototropism
pruning
Which of the following plant growth hormone increases the yield of sugar by increasing the length of stem in sugarcane?
Cytokinin
Auxin
Abscisic acid
Ethylene
Ethylene
One hormone hastens the maturity period in juvenile conifers, a second hormone controls xylem differentiation while the third increases the tolerance of plants to various stresses and they are respectively-
Auxin, Gibberellin and Cytokinin
Gibberellin, Auxin and Cytokinin
Gibberellin, Auxin and Ethylene
Gibberellin, Auxin and ABA
Gibberellin, Auxin and ABA
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