Advertisements
Advertisements
प्रश्न
What does a root do in response to light? What is this phenomenon known as?
उत्तर
Root always grows downwards and away from light. This phenomenon is known as negative phototropism.
APPEARS IN
संबंधित प्रश्न
Plant roots grow downward in response to ______.
What is the difference between thigmotropism and thigmonasty? Name one plant which exhibits thigmotropism and one plant which exhibits thigmonasty. What behaviour (or responses) of these plants make you think that they exhibit thigmotropism and thigmonasty respectively?
The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:
The growth of a pollen tube towards the ovule caused by a sugary substance as stimulus is an example of :
(a) phototropism
(b) chlorotropism
(c) gravitropism
(d) chemotropism
Differentiate between:
Phototropism and chemotropism
With the help of an experiment, prove that roots are more positively hydrotropic than geotropic.
The tropic movement that helps the climbing vines to find a suitable support is ______.
The opening and closing of the Moonflower is not a tropism because the movement in this is ______.
Name a plant hormone responsible for bending of a shoot of a plant when it is exposed to unidirectional light. How does is promote phototropism?
Which parts of a plant exhibit Negative geotropism?
