Plant Growth and Development Short Questions and Answers

Questions

41 Temperature range for plant growth is

A 25°-35°C

B 0°-35°C

C 10°-50°C

D 0°-20°C

View Answer

Answer: 0°-35°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

View Answer

Answer: Intussusception

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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

View Answer

Answer: Boyson Jensen

44 Exponential growth is shown during

A Lag phase

B Log Phase

C Maturation phase

D Senescence phase

View Answer

Answer: Log 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

View Answer

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

View Answer

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

View Answer

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

View Answer

Answer: All the above

49 Ferulic acid,coumarin and hesperidin are

A Secondary plant products

B Hormones

C Enzymes

D Vitamins

View Answer

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

View Answer

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

View Answer

Answer: Higher level of gibberellin

52 Hormone involved in Breaking dormancy of winter Buds is

A Ethylene

B Gibberellin

C Auxin

D Cytokinin

View Answer

Answer: Auxin

53 The term Yarovization was coined by

A Lysenko

B Melba

C Yabuta

D Kohl and Haagen – Smit

View Answer

Answer: Lysenko

54 Avena coleoptile test is for which of the following hormone

A GA

B ABA

C IAA

D NAA

View Answer

Answer: IAA

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

View Answer

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

View Answer

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

View Answer

Answer: Darwin

58 Cytokinins are generally

A Acids

B Aminopurines

C Phenols

D Glucosides

View Answer

Answer: Aminopurines

59 Delay in Senescence is caused by the spray of

A IBA

B GA

C Cytokinin

D ABA

View Answer

Answer: Cytokinin

60 The growth hormone, gibberellin was discovered by

A Yabuta and Sumiki

B Dutrochet and Folk

C Donoho and walker

D Hadhmioto and Rappaport

View Answer

Answer: Yabuta and Sumiki

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