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

1. Efficiency index	2. Plasticity
3. Norm of reaction	4. Developmental noise

Identify the incorrectly matched pair:

Identify the plant growth regulator that, though is largely an inhibitor but, can be placed in both plant growth promoter and plant growth inhibitor groups?

Identify the incorrectly matched pair:

Auxin does not:
1. Help to initiate rooting in stem cuttings
2. Promote female flowers in cucumbers
3. Prevent fruit and leaf drop in early stages
4. Promote abscission of older mature leaves and fruits

Cytokinins do not help in:
1. Production of new leaves                 
2. Lateral shoot growth
3. Adventitious shoot formation             
4. Promotion of apical dominance

Normally, when the seeds are mature, ethylene production increases and builds-up within the fruit, resulting in a climactic event that means:

Which PGR stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stress?

In most situations, which PGR acts as an antagonist to GAs?

The site of perception of light/dark duration in plants is:
1. Root apex                 
2. Shoot apex
3. Flower                     
4. Leaves