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
(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (ii) and (iv)

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Solution

(d) (ii) and (iv)

The folding up of leaves in sensitive plant as a response to touch and the opening up of leaves of a daisy flower in response to light are nastic movements.

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Similar questions

Fill in the following blanks:

(a) A plant's response to light is called .................

(b) A plant's response to gravity is called .................

(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 known as ..............

(h) ........... is the hormone that causes phototropism in plants

(i) The response of leaves to the sunlight is called ..............

(i)	Cell division	(ii)	Cell enlargement
(iii)	Pattern formation	(iv)	Tropic growth
(v)	Flowering	(vi)	Fruiting
(vii)	Seed germination	(viii)	Response to wounding
(ix)	Response to stresses of biotic and abiotic origin	(x)	Dormancy

	Functions of growth promoters	Functions of growth inhibitors
(a)	(i), (ii), (vii), (ix)	(iii), (iv), (v), (vi), (viii), (x)
(b)	(viii), (ix), (x)	(i), (ii), (iii), (iv), (v), (vi), (vii)
(c)	(i), (ii), (iii), (iv), (v), (vi), (vii)	(viii), (ix), (x)
(d)	(i), (ii), (iii), (iv), (v), (vi), (vii), (ix), (x)	(viii)

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