Development

Treatment of seed at low temperature under moist conditions to break its dormancy is called:

1. sacrification

2. vernalization

3. chelation

4. stratification

The wavelength of light absorbed by Pr form of phytochrome is:

1. 640 nm

2. 680 nm

3. 720 nm

4. 620 nm

Photoperiodism was first characterized in:

1. tobacco

2. potato

3. tomato

4. cotton

Phytochrome is a:

1. flavoprotein

2. glycoprotein

3. lipoprotein

4. chromoprotein

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

1. Leaves

2. Lateral buds

3. Pulvinus

4. Shoot apex

Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:
1. Gibberellic acid
2. Nitrate
3. Ascorbic acid
4. Chilling conditions

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

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

The site of perception of light in plants during photoperiodism is:

1. Axillary bud

2. Leaf

3. Shoot apex

4. Stem

Which one of the following plants does not show plasticity?
1. Maize
2. Cotton
3. Coriander
4. Buttercup