A short day plant is one that flowers on photoperiods shorter than the critical day length. It generally flowers when treated by a short day and uninterrupted long night (more than 12 hrs.)

Correct Option: B

A short day plant is one that flowers on photoperiods shorter than the critical day length. It generally flowers when treated by a short day and uninterrupted long night (more than 12 hrs.)

Vernalization is the method of inducing early flowering in plants by pretreatment of their seeds at low temperature.

Correct Option: D

Vernalization is the method of inducing early flowering in plants by pretreatment of their seeds at low temperature.

Twining of tendrils is due to thigmotropism i.e. movement due to the contact with a foreign body (touch).

Correct Option: A

Twining of tendrils is due to thigmotropism i.e. movement due to the contact with a foreign body (touch).

In the absence of light stem becomes excessive long due to ‘etiolation’. This causes cells of internodes to get enlarged.

Correct Option: C

In the absence of light stem becomes excessive long due to ‘etiolation’. This causes cells of internodes to get enlarged.

Vernalization is the low temperature treatment for flowering in plants. Plants are treated (seeds and seedlings) with very low temperature to promote germination. A Lang & co-workers demonstrated that the application of gibberellins can replace the cold treatment or vernalization in many plants.

Correct Option: C

Vernalization is the low temperature treatment for flowering in plants. Plants are treated (seeds and seedlings) with very low temperature to promote germination. A Lang & co-workers demonstrated that the application of gibberellins can replace the cold treatment or vernalization in many plants.