The climbing organs of plants like tendr...

The climbing organs of plants like tendrils grow towards any suppory which they happen to touch and wind around the support. This is an example of:

chemotropism

nastic movement

thigmotropism

geotropism

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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 and support which they happen to touch and wind around that support. It is observed that organ R originated 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 twinning of tendrils around a support is a good example of

Coiling of graden pea tendrils around any support is an example of

A sensitive thread-like structure which can coil around a support is

A plant has weak stem which can coil around an upright support . It is a

Which of the following are not tropisms? (i) growing of pollen tube in response to a sugary substance (ii) folding up of leaves of sensitive plant in response to touch (iii) winding of tendril around a support in response to touch (iv) opening up of the leaves of a daisy flower in response to light?

Fill in the following blanks: (a) A plant's response to light is called........ (b) A plant's response to gravity is called..... . (c) Plant shoot grows upward in response to....... (d) Plant roots grow downward in response to ....... (e) Tendrils wind around a support in response to ........ (f) Plant roots grow towards.... and in the direction of force of ........ (g) A root of a plant grows downward. This is knows as......... (h) ......is the hormone that causes phototropism in plants (i) The response of leaves to the sunlight is called ...............

In the given diagrams, A ( spine ) and B ( tendril ) are structured which are modifications of the stem. Then , probable examples of plants in which A and B can be observed , respectively , will be. :

LAKHMIR SINGH & MANJIT KAUR-CONTROL AND COORDINATION -Exercise

Which of the following acts as a stimulus in the process of hydrotropi...
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The growth movement of a plant part in response to the touch of an obj...
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The climbing organs of plants like tendrils grow towards any suppory w...
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The rate of growth in roots is decreased by one of the following plant...
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When the leaves of a Mimosa pudica plant are touched with a finger, th...
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Dandelion flowers open the petals in bright light during the daytime b...
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To which of the following directional stimulus roots of a plant do not...
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One of the following is not caused by the growth related movement of t...
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The bending of the root of a plant away from a source of light is caus...
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Most of the plant hormones promote plant growth. A plant hormone which...
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The movement of a shoot towards light is:
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The bending of the root of a plant away from a source of light is caus...
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The plant part which exhibits negative geotropism is:
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Which of the following are not tropisms? (i) growing of pollen tube...
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The chemical substance P is made and secreted by the meristematic tiss...
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A potted plant is growing in a transparent glass jar. In this plant, X...
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There are three plants A,B and C. the flowers of plant A open their pe...
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While conducting experiments to study the effect of various stimuli on...
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P and Q are two types of plants having weak stems which cannot stand u...
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The top part A of the flask-shaped reproductive organ X in the flower ...
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