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

Clear selection

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

Clear selection

4. Avena coleoptile test was conducted by

1 point

a) Darwin

b) N. Smit

c) Paal

d) F.W. Went

Clear selection

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

1 point

a) Auxin

b) Cytokinin

c) Gibberellins

d) Ethylene

Clear selection

Clear form

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