a: Xylem ~
b: a long column


"This pulling force is called transpiration pull. The water in the xylem is like a long column. As the top of the column is pulled (transpiration), the rest of the column is pulled with it, called tension. Water can be pulled so high in plants because of the small size of the individual xylem and the cohesive properties of water. The same hydrogen bonds that account for water's high specific heat give water a cohesive property that allows the xylem to act like a contiguous column."

Writer: Not Stated
Date: Jan 23 2015 12:58 PM

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