Plant Growth and Development

Match List I with List II :

1. A-I, B-II, C-IV, D-III
2. A-I, B-IV, C-III, D-II
3. A-IV, B-III, C-II, D-I
4. A-III, B-I, C-IV, D-II

Which one of the following is not a characteristic of plant cells in the phase of elongation ?

1. New cell wall deposition
2. Cell enlargement
3. Large conspicuous nuclei
4. Increased vacuolation

Heterophyllous development in response to environment is an example of which of the following phenomena?

1. Redifferentiation
2. Dedifferentiation
3. Elasticity
4. Plasticity

Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?

1. Ethephon
2. Abscisic acid
3. Gibberellin
4. Indole butyric acid

Which of the following plant growth regulators is used as herbicide?

1. Gibberellin
2. 2,4-D
3. Kinetin
4. Abscisic acid

Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th day?

1. 460 cm
2. 50 cm
3. 170 cm
4. 230 cm

Read the following statements on plant growth and development. Choose the option with all correct statements.

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

Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?

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

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin

1. promotes apical dominance.
2. promotes abscission of mature leaves only.
3. does not affect mature monocotyledonous plants.
4. can help in cell division in grasses, to produce growth.

Formation of interfascicular cambium from fully developed parenchyma cells is an example for

1. Differentiation
2. Redifferentiation
3. Dedifferentiation
4. Maturation

Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield?

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

Match List-I with List-II :

1. A-II, B-III, C-IV, D-I
2. A-III, B-II, C-I, D-IV
3. A-II, B-I, C-IV, D-III
4. A-II, B-I, C-III, D-IV

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

The phenomenon by which the undividing parenchyma cells start to divide mitotically during plant tissue culture is called as

1. Secondary growth
2. Differentiation
3. Dedifferentiation
4. Redifferentiation

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called

1. Maturity
2. Elasticity
3. Flexibility
4. Plasticity

The site of perception of light in plants during photoperiodism is

1. Leaf
2. Shoot apex
3. Stem
4. Axillary bud

The plant hormone used to destroy weeds in a field

1. IBA
2. IAA
3. NAA
4. 2, 4-D

Which of the following is not an inhibitory substance governing seed dormancy?

1. Para-ascorbic acid
2. Abscisic acid
3. Gibberellic acid
4. Phenolic acid

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop

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

The process of growth is maximum during

1. Log phase
2. Lag phase
3. Dormancy
4. Senescence

What is the site of perception of photoperiod necessary for induction of flowering in plants?

1. Shoot apex
2. Leaves
3. Lateral buds
4. Pulvinus