Question

Match the theories given in column I with the names of scientists listed in column II. Choose the answer which gives the correct combination of the alphabets.

• A. A = r; B = s; C = t; D = q
• B. A = s; B = r; c = p; d = q
• C. A = r; B = q; C = t; D = p
• D. A = q; B = p; C = t; D = r

Answer 1

Answer: (A)

A = r; B = s; C = t; D = q

Answer 2

The theories given in question are related with ascent of sap (the process of translocation of sap from the roots to the top of the plants). Relay pump theory was given by Godlewski in 1884. According to this theory living tissues in the xylem bring about the pumping action of water in an upward direction. Transpiration-Cohesion theory, given by Dixon and Jolly in 1894, is based on following three facts: -Cohesive force or tensile strength of water -Continuity of water column -Transpiration pull Mass flow theory was given by Ernst Munch (1927, 1930), according to which food material is translocated through phloem along the concentration gradient between the source of food material to the site of utilization i . e ., sink. Pulsation theory was given by J.C. Bose in 19