A) Strasburger
B) Godlewski
C) Western
D) Dixon and Jolley
Correct Answer: D
Solution :
Cohesion theory or transpiration pull theory was proposed by Dixon and Jolly in 1984. This theory is popularly known as Dixons cohesion theory. The main points of this theory are (i) Cohesion forces Water molecules are wheld together by strong cohesion force which is due to presence of hydrogen bonds. (ii) Continuous water column Present in the walls of xylem channels. (iii) Transpiration pull Loss of water from the aerial parts in transpiration causes a suction pressure in the water column of plant. The continuity of water column does not break due to cohesion force. Strasburger gave the process of fertilization in plants.
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