Question

Match the columns and find the correct option.

(a) Munch	(i) Stomatal movement
(b) Darwin	(ii) Hastens fruit ripening by volatiles
(c) Cousins	(iii) Growth of coleo towards light
(d) Levitt	(iv) Nature of enzymes
	(v) Bidirectional traces in phloem

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

Answer 1

Answer: (C)

a- v, b- iii, c- ii, d- i

The Pressure Flow Hypothesis was proposed by Ernst Munch. It explains the movement of sap through the phloem. According to this theory, phloem shows bidirectional movement and xylem shows unidirectional movement. Darwin studied the bending of coleoptile tip towards the light due to polar movement of auxin in the stem. H. H. Cousins first suggested that ethylene is the natural volatile hormone produced by fruits of plants. Ethylene hastens fruits ripening in plants. Levitt gave the mechanism of stomatal movement. According to him, stomata open due to the influx of potassium ions into the guard cells.

Thus, the correct answer is option C.