Advertisements
Advertisements
प्रश्न
Which of the following is not caused by a growth movement?
विकल्प
Bending of the shoot of a plant in response to light.
Closing up of leaves of a sensitive plant on touching with an object.
Climbing up of a plant on an object by using tendrils.
Movement of the root of a plant towards a source of water.
उत्तर
Closing up of leaves of a sensitive plant on touching with an object.
Explanation:
This is a non-directional movement of a plant in response to touch.
APPEARS IN
संबंधित प्रश्न
What happens to the moonflower
- during the daytime, and
- at night?
What is this phenomenon known as?
To which directional stimuli do shoots respond?
To which of the following directional stimulus roots of a plant do not respond?
A potted plant is growing in a transparent glass jar. In this plant, X and Y are the two growing parts having a lot of meristematic tissue. It is observed that the part X of this plant exhibits positive geotropism but negative phototropism. On the other hand, part Y of this plant exhibits negative geotropism but positive phototropism.
(a) Name the part X of plant.
(b) Name the part Y of plant.
(c) Which part of the plant, X or Y, will exhibit positive hydrotropism?
(d) Which part of the plant, X or Y, can have tendrils on it?
(e) Which phytohormone causes the part X to exhibit negative phototropism?
The response of plants to gravity is known as geotropism. How are plant parts sensitive to gravity? Describe with the help of a diagram.
A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of ______.
The shoot system grows upward in response to ______.
Give the scientific term for the following:
Growth-dependent movement in plants.
While conducting experiments to study the effects of various stimuli on the plants, it was observed that the roots of plant X grow and bend towards two stimuli A and B but bend away from a third stimulus C. The stem of the plant X however bends ” away from stimulus A and B but bends towards the stimulus C. The stimulus B is known to act on the roots due to factors related to Earth. Keeping these points in mind, answer the following questions:
- What could be stimulus A?
- Name the stimulus seen in B.
- What could be stimulus-C?
The height of a plant is regulated by ______.
