What is the general name of chemical substances which bring about control and coordination in plants ?
Which plant hormone is responsible for the wilting and falling of leaves ?
Abscisic acid is responsible for the wilting and falling of leaves in plants.
Which plant hormone makes a stem (or shoot) bend towards light ?
Where is the auxin hormone made in a plant stem ?
Auxin is made at the tip of the plant stem.
What is the scientific name of sensitive plant ?
Name one plant hormone that promotes growth and another plant hormone which inhibits growth.
A plant hormone that promotes growth is Gibberellin and the hormone that inhibits growth is abscisic acid.
Name one example of the movement of a plant part which is very quick and can be observed easily.
Thigmonastic movement in the leaves of touch-me-not plant is very quick and can be observed easily.
Name the type of chemical substances that control the growth in plants.
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