Plant Growth and Development MCQ Questions & Answers in Botany

111. Selaginella sperms swims towards the archaegonia, this movement is

A Chemotropic

B Chemotactic

C Chemonastic

D Archaenastic

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112. Indole, 3 acetic acid, called as auxin was first isolated form

A Human urine

B Corn germ oil

C Fusarium

D Rhizopu

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113. Premature fall of fruit can be stopped by

A Auxin

B GA3

C ABa

D None of the above

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114. Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?

A It made possible the isolation and exact identification of auxin

B It is the basis for quantitative determination of small amounts of growth-promoting substances

C It supports the hypothesis that IAA is auxin

D It demonstrated polar movement of auxins

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115. Substance which originate at the tip of stem to control growth

A Vitamins

B Enxymes

C Food materials

D Auxins

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116. What reason will you assign for coconut milk used in tissue culture?

A Gibberellins

B Cytokinins

C Auxins

D Ethylene

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117. Which of the groweth substance acts as a stimulant during nodule formatioin in leguminous plant

A Ethylene

B ABA

C IAA

D Morphactin

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118. Negatively geotropic roots present in

A Bryophytes

B Mangrooves

C Pteridophytes

D Xerophytes

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119. If a tree flowers thrice in a year in October, January and Jylu in northen India, the plant is

A Photo and thermo sensitive

B Photo and thermo insensitive

C Photosensitive but thermo insensitive

D Thermo sensitive but photo insensitive

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120. Diurnal change in flower and leaf is known as

A Nyctinasty or sleep movement

B Haptonasty

C Photonasty

D None of the above

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111. Selaginella sperms swims towards the archaegonia, this movement is

112. Indole, 3 acetic acid, called as auxin was first isolated form

113. Premature fall of fruit can be stopped by

114. Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?

115. Substance which originate at the tip of stem to control growth

116. What reason will you assign for coconut milk used in tissue culture?

117. Which of the groweth substance acts as a stimulant during nodule formatioin in leguminous plant

118. Negatively geotropic roots present in

119. If a tree flowers thrice in a year in October, January and Jylu in northen India, the plant is

120. Diurnal change in flower and leaf is known as

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