Auxin Function

Parthenocarpic tomato fruits can be produced by:

1.	removing androecium of flowers before pollen grains are released
2.	treating the plants with low concentrations of gibberellic acid and auxins
3.	raising the plants from vernalised seeds
4.	treating the plants with phenylmercuric acetate

How does pruning help in making the hedge dense?

1.	It includes the differentiation of new shoots from the rootstock
2.	It frees axillary buds from apical dominance
3.	The apical shoot grows faster after pruning
4.	It releases wound hormones

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. Gibberellin & abscisic acid

Fruit and leaf drop at early stages can be prevented by the application of:
1. Ethylene
2. Auxins
3. Gibberellic acid
4. Cytokinins

It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

1. Cytokinin and Abscisic acid

2. Auxin and Ethylene

3. Gibberellin and Cytokinin

4. Gibberellin and Abscisic acid

The plant hormone used to destroy weeds in a field is:

1.	2, 4-D	2.	IBA
3.	IAA	4.	NAA

Read the following statements on plant growth and development.

A.	Parthenocarpy can be induced by auxins.
B.	Plant growth regulators can be involved in promotion as well as inhibition of growth
C.	Dedifferentiation is a pre-requisite for re-differentiation.
D.	Abscisic acid is a plant growth promoter.
E.	Apical dominance promotes the growth of lateral buds.

Choose the option with all correct statements:

1.	A, D, E only
2.	B, D, E only
3.	A, B, C only
4.	A, C, E only