Advertisements
Advertisements
प्रश्न
Plant roots grow ______ and in the direction of force of ______.
उत्तर
Plant roots grow downwards and in the direction of force of gravity.
APPEARS IN
संबंधित प्रश्न
What is the stimulus in chemotropism?
What does a plant root do in response to water? What is this phenomenon known as?
Define phototropism. Give one example of phototropism.
The movement of sunflower in accordance with the path of the sun is due to :
(a) photonasty
(b) phototropism
(c) hydrotropism
(d) chemotropism
Answer the following question.
What is tropism?
The growth of tendrils in pea plants is due to
The opening and closing of the Moonflower is not a tropism because the movement in this is ______.
When the leaves of the Mimosa pudica plant are touched with a finger, they fold up quickly.
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?
Where are auxins synthesized in a plant? Which organ of the plant shows:
- Positive phototropism
- Negative geotropism
- Positive hydrotropism
