Plant Growth And Development MCQ

1. Coconut milk contains a cytokinin called ____ which promotes plant growth.

1. Naphthalene acetic acid
2. Indole-3-acetic acid
3. Gelatin
4. Zeatin

2. One of the following is not an auxin 

1. Indole-3-acetic acid
2. Malic Hydrazide
3. Indole butyric acid
4. Naphthalene acetic acid

3. _________can stimulate the germination of barley seeds

1. α-amylase
2. Abscisic acid
3. Benzoic acid
4. Coumarin

4. Seed dormancy is triggered by

1. Indole-3-ethanol
2. Abscisic acid
3. Carbon dioxide
4. None of the above

5. The significance of the day length in plants was first shown in:

1. Barley
2. Lettuce
3. Tobacco
4. Tomato

6. Uneven distribution of auxins may lead to

1. Phototrophic curvature
2. Day-neutral curvature
3. Both (1) and (2)
4. None of the above

7. Tendrils of garden peas coiling around any support signifies:

1. Seismonasty
2. Thigmotaxis
3. Gravitropism
4. Thigmotrophism

8. ____________ tissues synthesize natural cytokinins

1. Old
2. Rapidly dividing
3. Storage
4. None of the above

9. ________ is a plant hormone generally present in the gaseous state

1. Ethylene
2. Ethane
3. Argon
4. None of the above

10. _________ is a colourless gas that serves as a signalling hormone.

1. Benzene
2. Nitric Oxide
3. Ozone
4. None of the above

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