English

What is the stimulus in phototropism? - Science

Advertisements
Advertisements

Question

What is the stimulus in phototropism?

One Line Answer

Solution

The stimulus in phototropism is Light.

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 9.1 | Page 92

RELATED QUESTIONS

Where is the auxin hormone made in a plant stem?


What does a tendril do in response to the touch of a support? What is this phenomenon known as?


What is meant by nastic movements in plants? Give one example of nastic movements in plants.


A big tree falls in a forest but its roots are still in contact with the soil.
The branches of this fallen tree grow straight up (vertically). This happens in response to ______.


Which of the following is not caused by a growth movement?


One of the following is not caused by the growth related movement of the concerned plant part. This is:


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?


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.


Plants take in carbondioxide for photosynthesis but need ______ for their living.


Differentiate between:

Positive and negative tropism


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×