TNPSC GURU.In - Tamil Nadu 10th Science - Biology - Unit

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TNPSC GURU.In - Tamil Nadu 10th Science - Biology - Unit - 16

1. Gibberellins cause:

1 point

a) Shortening of genetically tall plants

b) Elongation of dwarf plants

c) Promotion of rooting

d) Yellowing of young leaves

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2. The hormone which has positive effect on apical dominance is:

1 point

a) Cytokinin

b) Auxin

c) Gibberellin

d) Ethylene

Clear selection

3. Which one of the following hormones is naturally not found in plants:

1 point

a) 2, 4-D

b) GA3

c) Gibberellin

d) IAA

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4. Avena coleoptile test was conducted by

1 point

a) Darwin

b) N. Smit

c) Paal

d) F.W. Went

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5. To increase the sugar production in sugarcanes they are sprayed with _______

1 point

a) Auxin

b) Cytokinin

c) Gibberellins

d) Ethylene

Clear selection

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