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Free download in PDF Plant Growth and Development Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
Temperature range for plant growth is
[A]
25°-35°C
[B]
0°-35°C
[C]
10°-50°C
[D]
0°-20°C
42
During wall enlargement new wall materials are inserted amongst the older ones.The phenomenon is
[A]
Accretion
[B]
Integration
[C]
Intussusception
[D]
Interpolation
43
Name the scientist who discovered that decapitated coleoptile would resume photo sensitivity and growth if served tip is reattached through a gelatin disc
[A]
Darwin
[B]
Van Overbeek
[C]
Boyson Jensen
[D]
Paal
44
Exponential growth is shown during
[A]
Lag phase
[B]
Log Phase
[C]
Maturation phase
[D]
Senescence phase
45
Correct sequence of different stage of development is
[A]
Fruiting – flowering-juvenility-germination
[B]
Germination-juvenility-flowering-fruiting
[C]
Flowering-fruiting-juvenility-germination
[D]
Juvenility-flowering-fruiting-germination
Answer: Germination-juvenility-flowering-fruiting
46
Current sequence of different phases of growth is
[A]
Cell division-cell differentiation- cell elongation
[B]
Cell differentiation-cell division-cell elongation
[C]
Cell elongation-cell division-cell differentiation
[D]
Cell division-cell elongation-cell differentiation
Answer: Cell division-cell elongation-cell differentiation
47
A decapitated plant exposed to unilateral light
[A]
Bends away from source of illumination
[B]
Bends towards the source of light
[C]
Shows zigzag curvature
[D]
Does not show bending moment
Answer: Does not show bending moment
48
Gibberellins take part in
[A]
Bolting of rosette plants
[B]
Replacing long day requirement
[C]
Overcoming genetic dwarfism
[D]
All the above
49
Ferulic acid,coumarin and hesperidin are
[A]
Secondary plant products
[B]
Hormones
[C]
Enzymes
[D]
Vitamins
Answer: Secondary plant products
50
Differentiation of callus requires a specific ratio of two hormones
[A]
Auxin and gibberellin
[B]
Auxin and abscisic acid
[C]
Gibberellin and abscisic acid
[D]
IAA and cytokinin
Answer: IAA and cytokinin
51
Rapid growth of flowering axis in many plants is caused by
[A]
Lower level of abscisic acid
[B]
Higher level of auxin
[C]
Higher level of gibberellin
[D]
Lower level of auxin
Answer: Higher level of gibberellin
52
Hormone involved in Breaking dormancy of winter Buds is
[A]
Ethylene
[B]
Gibberellin
[C]
Auxin
[D]
Cytokinin
53
The term Yarovization was coined by
[A]
Lysenko
[B]
Melba
[C]
Yabuta
[D]
Kohl and Haagen – Smit
54
Avena coleoptile test is for which of the following hormone
[A]
GA
[B]
ABA
[C]
IAA
[D]
NAA
55
Seedless Tomatoes are produced by
[A]
Supplying radioactive compounds
[B]
Spraying hormones on flower
[C]
Propagating tomato plants from cuttings
[D]
Growing tomato plants in mineral solution
Answer: Spraying hormones on flower
56
Apples are generally wrapped in waxed paper to
[A]
Prevent sunlight from changing its colour
[B]
Prevent aerobic respiration by checking the entry of oxygen
[C]
Prevent ethylene formation that hastens ripening
[D]
Make the apples look costly
Answer: Prevent ethylene formation that hastens ripening
57
The response of plants to light was first of all discovered by
[A]
J.B.Lamarck
[B]
Darwin
[C]
Thimann
[D]
F.W.Went
58
Cytokinins are generally
[A]
Acids
[B]
Aminopurines
[C]
Phenols
[D]
Glucosides
59
Delay in Senescence is caused by the spray of
[A]
IBA
[B]
GA
[C]
Cytokinin
[D]
ABA
60
The growth hormone, gibberellin was discovered by
[A]
Yabuta and Sumiki
[B]
Dutrochet and Folk
[C]
Donoho and walker
[D]
Hadhmioto and Rappaport
Answer: Yabuta and Sumiki
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