Question

Match Column I with Column II and select the correct option from the codes given below.

Column I	Column II
(a) Growth of pollen tube towards embryo sac	(i) Thigmonasty
(b) Opening of flower	(ii) Siesmonasty
(c) Turgor movement	(iii) Epinasty
(d) Bending of tentacles of Drosera over the insect	(iv) Chemotropism

• A. a-(i), b-(ii), c-(iii), d-(iv)
• B. a-(iv), b-(iii), c-(ii), d-(i)
• C. a-(ii), b-(iii), c-(i), d-(iv)
• D. a-(iii), b-(iv), c-(ii), d-(i)

Answer 1

The correct option is B a-(iv), b-(iii), c-(ii), d-(i)

Thigmonasty is the response of a plant to touch or vibration. In Drosera, tentacles bend towards the insect's direction after coming in contact. Seismonasty is a response to touch or blow. In Mimosa pudica, turgor movement is seen in leaflets in response to touch. Epinasty is the movement due to greater growth of the upper or inner surface. An example of epinasty is opening of flower and downward dropping of bud. Chemotropism is the response of a plant to chemical stimulus. An example of chemotropism is growth of pollen tube towards embryo sac due to presence of sugar in the style.

Thus, the correct answer is option B.