91.  Which of the following group show viviparous germination ?

A. Rhizophora and Avicinnia

B. Orchid and Rhizophora

C. Maize and Bean

D. Soyabean and Xanthium

Answer : Option A

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92.  Which of the following is found in high concentration in healthy leaf ?

A. Cytokinin

B. Gibberrelin

C. Auxin

D. Ethylene

Answer : Option C

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93.  From the given below which is short-day plant ?

A. Paddy

B. Wheat

C. Oat

D. Opium

Answer : Option A

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94.  Which of the following is long-day plant ?

A. Oat

B. Soyabean

C. Vinca

D. Paddy

Answer : Option A

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95.  Which hormones are obtained from fungi and fish, respectively ?

A. Gibberrelin and zeatin

B. IAA and IBA

C. Gibberrelin and 2-4 D

D. Gibberrelin and cytokinin

Answer : Option D

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96.  Vernalization means..............

A. Growth Graph

B. Flowering at high temperature

C. Effect of light on growth

D. Speedy flowering at low temperature

Answer : Option D

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97.  Flowering due to low temperature is .........

A. Thermonasty

B. Vernalization

C. Nutation

D. Photonasty

Answer : Option B

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98.  If temporary light is made available for dark phase of long day plant, what is observed ?

A. Flowering will not occur

B. Increase in flowering

C. Decreasing in flowering

D. No change

Answer : Option A

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99.  Which is an essential temperature for more production of wheat by noting effect of low temperature?

A. 1to 20' C

B. 28 to 30' C

C. °1to10' C

D. 25 to 30' C

Answer : Option C

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100.  By which condition flowering take place in short day plant ?

A. Short day and long night

B. Short day and short night

C. Short night

D. Long day and short night

Answer : Option A

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