Plant Growth and Development · Question 12

F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :

1. Extract of Vascular tissues
2. Coconut milk
3. Abscisic acid
4. Yeast Extract

Given below are some statements about plant growth regulators. Choose the correct set of statements from the options given below :

1. A, C, D
2. B, E
3. A, B, C
4. B, D, E

Spraying of which of the following phytohormone on juvenile conifers helps hastening the maturity period, that leads early seed production?

1. Gibberellic Acid
2. Zeatin
3. Abscisic Acid
4. Indole-3-butyric Acid

Which hormone promotes internode/petiole elongation in deep water rice?

1. Kinetin
2. Ethylene
3. 2,4-D
4. GA3

In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as

1. Dedifferentiation
2. Development
3. Senescence
4. Differentiation

Which one of the following plants does not show plasticity?

1. Cotton
2. Coriander
3. Buttercup
4. Maize

The gaseous plant growth regulator is used in plants to:

1. speed up the malting process
2. promote root growth and root hair formation to increase the absorption surface
3. help overcome apical dominance
4. kill dicotyledonous weeds in the fields

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants:

1. ABA
2. Gibberellin
3. Ethylene
4. Cytokinin

The ability of plants to follow different pathways in response to environment leading to formation of different kinds of structures is called

1. Differentiation
2. Redifferentiation
3. Development
4. Plasticity

Which of the following growth regulators is an adenine derivative?

1. Abscisic acid
2. Auxin
3. Cytokinin
4. Ethylene