Fruit and leaf drop at early stages can be prevented by the application of
4. gibberellic acid
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
1. IAA and gibberellin
2. Auxin and cytokinin
3. Auxin and abscisic acid
4. Glbberellin & abscisic acid
Phytochrome is a
The Avena curvature is used for bioassay of
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?
(a) Green plants need light to perform photosynthesis
(b) Green plants seek light because they are phototropic
(c) Light stimulates plant cells on the lighted side to grow faster
(d) Auxin accumulates on the shaded side, stimulating greater cell elongation
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?