Water moves up the xylem because water evaporates in the leaves and cohesion means that the water molecules form a weak "chain" that will be pulled upwards and outwards. Adhesion to the xylem walls ensures that the "chain" does not move downwards.
El agua sube por el xilema debido a la evaporación en las hojas y la cohesión de las moléculas de agua que forman una "cadena" débil que se tira hacia arriba y hacia afuera. La adhesión a las paredes del xilema asegura que la "cadena" no se mueva hacia abajo.
| Front | How does water move up the xylem? |
|---|---|
| Back | Water evaporates in the leaves and cohesion means that the water molecules form a weak "chain" that will be pulled upwards and outwards. Adhesion to the xylem walls ensures that the "chain" does not move downwards. |
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