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Practice MCQ for SSC, UPSC, RRB Exams
A.
A.
B.
B.
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D.
D.
Correct Answer: A
সঠিক উত্তর: A
Related Questions
সম্পর্কিত প্রশ্ন
Which plant hormone is primarily responsible for apical dominance?
The phenomenon of phototropism in plants is mediated by which hormone?
Which of the following plant movements is independent of the direction of the stimulus?
'Bolting' in some rosette plants, like cabbage, is induced by:
Which plant hormone promotes seed dormancy and helps plants cope with stress conditions like drought?
The growth of pollen tubes towards the ovule is an example of:
Which hormone is known as the 'stress hormone' in plants?
Photoperiodism, the response of plants to the relative lengths of light and dark periods, primarily affects:
The pigment involved in perceiving light for photoperiodism is:
The movement of sunflower heads tracking the sun is an example of:
Vernalization refers to the process of:
Which plant hormone promotes cell division, morphogenesis, and delays senescence?
The closing of stomata in response to water stress is regulated by:
Thigmotropism is best exemplified by:
Which of these is a synthetic auxin used as a herbicide?
The 'sleep movements' of leaves (e.g., in leguminous plants) are an example of:
Which plant hormone is involved in breaking seed and bud dormancy?
The site of perception of light in phototropism is the:
Parthenocarpy (development of fruit without fertilization) can be induced by the application of:
The primary effect of auxin on plant cell walls is to:
Which of the following is a gaseous plant hormone?
The response of a plant part to the touch of a solid object is known as:
Short-day plants flower when the:
The phenomenon where the terminal bud inhibits the growth of lateral buds is called:
Which hormone is responsible for the negative geotropism of shoots and positive geotropism of roots?
The rapid drooping of leaves in
Mimosa pudica
(touch-me-not plant) upon touch is an example of:
Florigens are hypothetical hormones believed to be involved in:
The "triple response" in seedlings (inhibition of stem elongation, promotion of lateral swelling, and horizontal growth) is induced by:
In the context of plant hormones, 'senescence' refers to:
Which of the following is NOT a primary role of gibberellins?
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