English

Plant shoot grows upward in response to ______. - Science

Advertisements
Advertisements

Question

Plant shoot grows upward in response to ______.

Fill in the Blanks

Solution

Plant shoot grows upward in response to light.

shaalaa.com
  Is there an error in this question or solution?
Chapter 2: Control and Coordination - Exercise 1 [Page 93]

APPEARS IN

Lakhmir Singh Biology (Science) [English] Class 10
Chapter 2 Control and Coordination
Exercise 1 | Q 16.3 | Page 93

RELATED QUESTIONS

Name one example of the movement of a plant part which is very quick and can be observed easily.


Name the five types of tropisms.


 Define hydrotropism. Give one example of hydrotropism. State whether this example is of positive hydrotropism or negative hydrotropism. Illustrate your answer with the help of labelled diagram.


The growth of tendrils in pea plants is due to the :

(a) effect of sunlight on the tendril cells facing the sun
(b) effect of gravity on the part of tendril hanging down towards the earth
(c) rapid cell division and elongation in tendril cells that are away from the support
(d) rapid cell division and elongation in tendril cells in contact with the support


The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:


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, Q, R and S are four major types of phytohormones. P is a phytohormone which functions mainly as a growth inhibitor. It promotes the wilting and falling of leaves. Q, R and S are phytohormones which all promote growth of plants in various ways. Q is responsible for the phenomenon of phototropism in plants. R is involved mainly in shoot extensions. The phytohormone S helps in breaking the dormancy of seeds and buds. What are P, Q, R and S? Give one reason each for your choice.


Write the scientific terms used to represent the following:

Bending of roots towards the water.


Observe the three figures given below. Which of the following depicts tropic movements appropriately?

A B C

Differentiate between:

Positive and negative tropism


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×