According to the cohesion-tension mechanism of water transport, why does cohesion occur?
a. because water molecules tend to form hydrogen bonds with each other
b. because water is pushed into the xylem by bulk flow
c. because waxy coatings on the insides of xylem keep water molecules together in the xylem
d. because evaporation removes water from the leaves
Ans: a. because water molecules tend to form hydrogen bonds with each other
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