Name the type of chemical substances that control the growth in plants.

Name one plant hormone that promotes growth and another plant hormone which inhibits growth.

Name one example of the movement of a plant part which is very quick and can be observed easily.

What is the stimulus in:

(a) phototropism?

(b) geotropism?

(c) chemotropism?

(d) hydrotropism?

(e) thigmotropism?

Give the scientific terms used to represent the following:

(a) Bending of a shoot towards light.

(b) Growing of roots towards the earth.

(c) Growth of a pollen tube towards ovule.

(d) Bending of roots towards water.

(e) Winding of tendril around a support.