A few normal seedlings of tomato were kept in a dark room. After a few days they were
found to have become white-coloured like albinos. Which of the following terms will you
use to describe them?
Which one of the following growth regulators is known as "stress hormone" ?
1. abscisic acid
4. lndole acetic acid
During seed germination its stored food is mobilised by.
Phototropic curvature is the result of uneven distribution of.
Photoperiodism was first characterised in :-
Coiling of garden pea tendrils around any support is an example of
One of the synthetic auxin is
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
Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
1. vessels and tracheid differentiation
2. leaf abscission
3. annual plants
4. floral parts
Importance of day length in flowering of plants was first shown in