“Foolish seedling" disease of rice led to the discovery of:-

1. GA

2. ABA

3. 2,4-D

4. IAA

Importance of day length in flowering of plants was first shown in 

1. Lemna

2. tobacco

3. cotton

4. Petunia

One of the synthetic auxin is 

1. NAA

2. IAA

3. GA

4. IBA

Which one of the following acids is a derivative of carotenoids?

1. Indole-butyric acid

2. Indole-3-acetic acid

3. Gibberellic acid

4. Abscisic acid

Which one of the following pairs, is not correctly matched?

1. Abscisic acid - Stomatal closure

2. Gibberellic acid - Leaf fall

3. Cytokinin - Cell division 

4. IAA - Cell wall elongation

An enzyme that can stimulate germination of barley seeds is:-

1. α-amylase   

2. lipase

3. protease     

4. invertase

How does pruning help in making the hedge dense:-

Opening of floral buds into flowers, is a type of:-

1. autonomic movement of locomotion

2. autonomic movement of variation

3. paratonic movement of growth

4. autonomic movement of growth

Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in