Describe the biological significance of the cohesiveness of water.?

Question

Describe the biological significance of the cohesiveness of water.?

Answer 1

The cohesiveness of water is THE most important characteristic about it.  If water did not stick together with Hydrogen bonds then its boiling and freezing temps would be much different.  Also, it freezes and becomes less dense rather than more dense like most materials so it floats.  The means that rivers and lakes only freeze on the top and not solid.  If water froze solid life could not have evolved.

Answer 2

Water's cohesiveness is important for transpiration in plants.  When water evaporates from a plants stomata this pulls water up from the soil into the roots,and up through the plants xylem system.  The water moves from the soil up through the plant and out the stomata as one connected chain.  Therefore, the cohesiveness of water is important for plant transpiration.  This is called the Cohesion-Tension Theory of Sap Ascent.

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