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neet > plant growth > Flashcards

plant growth Flashcards

1
Q

parthenocarpy is induced by

A

auxin

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2
Q

flowering in pineapple is induced by

A

auxin

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3
Q

auxins were discovered by

A

F. W. Went

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4
Q

xylem differentiation is induced by

A

auxin

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5
Q

examples for synthetic auxins

A

2,4 Dichlorophenoxyacetic acid and Napthaleneacetic acid

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6
Q

2,4 D is effective against

A

dicot weeds

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7
Q

_____ gibberellins have been derived from fungi and other organisms

A

100

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8
Q

gibberellin was disovered by __

A

kuroswowa fujikorai

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9
Q

gibberellin causes ____ disease in rice seedlings

A

bakanae

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10
Q

most common gibberellin is ___

A

GA3

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11
Q

All gibberellins are _____

A

acidic

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12
Q

increase in length of grape stalks by

A

gibberellins

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13
Q

increase in internode length of sugarcane which increases the productivity ____

A

20 tonnes per acre

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14
Q

improves shape of apple

A

gibberellins

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15
Q

promotes bolting (internode elongation) in plants with rosette habit

A

gibberellins

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16
Q

spraying GA _____ hastens maturity period

A

juvenile confiers

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17
Q

___ used in brewing industry

A

gibberellins

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18
Q

___ is a synthetic cytokinin

A

kinetin

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19
Q

kinetin was discovered in ____

A

autoclaved herring sperm

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20
Q

cytokinins are chemically ____

A

modified adenines

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21
Q

zeatin was disovered in

A

corn kernels and coconut milk

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22
Q

cytokinins are formed in regions of ___

A

cell division

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23
Q

cytokinins overcome ____

A

apical dominance

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24
Q

auxin is antagonistic to

25
Q

cytokinin prevents ___

A

senescence by nutrient mobilization

26
Q

increase in chloroplast in leaves by

A

cytokinins

27
Q

increase in lateral buds and adventitious shoot by

A

cyrokinins

28
Q

kinetin is chemically

A

N6 furfuryl amino purine

29
Q

kinetin was disovered by

A

skoog and miller

30
Q

ethylene is ___

31
Q

increase in female flowers of cucumber by

32
Q

increase in root hair formation

33
Q

rooting in stem cuttings by

34
Q

internode/petiole elongation in deep water rice plants

35
Q

respiratory climactic means ___ and it is induced by ___

A

increased rate of respiration during ripening; ethylene

36
Q

ethylene promotes abcission and fruit drop in

A

cherry, walnut

37
Q

thinning of cotton by ___

38
Q

sprouting in potato tuber by

39
Q

ethylene initiates seed germination in

40
Q

flowering in mango and synchronise fruit set in pineapple

41
Q

abscisic acid promotes

A

seed dormancy

42
Q

ABA also called

A

stress hormone

43
Q

closure of stomata under water stress caused by

44
Q

ABA is antagonistic to

A

gibberellins

45
Q

___ plays a major role in seed development maturation and dormancy

46
Q

Heterophylly due to environment is seen in

47
Q

leaves of juvenile is different from adults in

A

cotton, coriander, larkspur

48
Q

development = ___ + ___

A

growth + differentiation

49
Q

all cells arise from

50
Q

first step in development

A

seed germination

51
Q

type of growth in which only one cell continues to divide

A

arithmetic growth

52
Q

j shaped growth curve is

53
Q

early stages of zygote development shows

54
Q

elongation of root at constant rate is

A

arithmetic

55
Q

plant growth is

A

indeterminate

56
Q

one maize cell produces

A

17,500 cells

57
Q

one watermelon seed can grow

A

3,50,000 times in size

58
Q

cell growth is practically

A

increase in protoplasm

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