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
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
B.
vernalization
Vernalization is the induction of a plant's flowering process by exposing it to low temperature. It shortens the juvenile or vegetative phase of the plant. This term was coined by Lysenko in 1928.
Cryobiology is the branch of biology that studies the effects of low temperature on living things within Earth's cryosphere or in science.
Phototropism is the orientation of a plant or other organism in response to light, either towards the source of light or away from it.
Pruning is a horticultural and silvicultural practice involving the selective removal of certain parts of a plant, such as branches, buds or roots.
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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