Opening of flower and drooping of a bud are

Hyponasty

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Epinasty

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Curvature movement

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Spontaneous movements

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Solution

The correct option is B Epinasty
Nastic movements are responses of plant parts to stimuli. Epinasty is the downward bending or drooping of a bud resulting from greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open as a result of epinasty. The hyponasty is an upward bending or uncoiling of leaves resulting from greater growth of the lower side.
Thus, the correct answer is option B.

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Similar questions

	List I		List II
A	Seismonasty	1	Circular movement of protoplasm with response to warm condition.
B	Thermotaxis	2	Downward movement of floral organs (closing flower).
C	Chemotaxis	3	Downward movement of leaf (drooping leaf).
D	Hyponasty	4	Movement of anthrozoids towards archegonia

__ protects the flower bud before it opens.

................. protects the flower bud before it opens.

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