English

What is the stimulus in chemotropism? - Science

Advertisements
Advertisements

Question

What is the stimulus in chemotropism?

One Line Answer

Solution

The stimulus in chemotropism is Chemicals.

shaalaa.com
  Is there an error in this question or solution?
Chapter 2: Control and Coordination - Exercise 1 [Page 92]

APPEARS IN

Lakhmir Singh Biology (Science) [English] Class 10
Chapter 2 Control and Coordination
Exercise 1 | Q 9.3 | Page 92

RELATED QUESTIONS

Plant roots grow ______ and in the direction of force of ______.


 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 stimulus in the process of thigmotropism is ______.


A growing seedling is kept in a dark room. A burning candle is placed near it for a few days. The top part of seedling bends towards the burning candle. This is an example of :
(a) chemotropism
(b) hydrotropism
(c) phototropism
(d) geotropism


While conducting experiments to study the effect of various stimuli on the plants, it was observed that the roots of a 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 stimuli A and B but bends towards the stimulus C. The stimulus B is known to act on the roots due to too much weight of the earth. Keeping these points in mind, answer the following question:

  1. What could stimulus A be?
  2. Name the stimulus B.
  3. What could stimulus C be?
  4. The branches of a fallen tree in a forest grow straight up in response to two stimuli. What could be these two stimuli out of A, B and C? Also name these two stimuli.

P and Q are two types of plants having weak stems which cannot stand upright on their own. The plants P and Q have organs R and S respectively which can grow towards any support which they happen to touch and wind around that support. It is observed that organ R originates from the leaves of the plant whereas organ S originates directly from the stem of the plant.
(a) What is (i) R, and (ii) S?
(b) What is the name of growth movement exhibited by the organs R and S?
(c) Name the stimulus involved in this case.
(d) State whether the behaviour of organs R and S is a tropic movement or a nastic movement.
(e) Name one plant like P and another plant like Q.


The Scientific term used to represent the bending of roots toward water is called geotropism.


Write the scientific terms used to represent the following:

Bending of roots towards the water.


Give an example for the movement of plant part which is very quick and can be observed easily.


Growth of root towards water is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×