What describes cohesion in relation to molecules?

Cohesion refers to the attraction between molecules of the same substance. This property is particularly important in understanding the behavior of liquids, especially water. Water molecules are polar, meaning they have a slight positive charge on one side and a slight negative charge on the other. This polarity allows water molecules to form hydrogen bonds with each other, creating a strong cohesive force that contributes to various physical properties, such as surface tension.

In scenarios like water forming droplets, the cohesive forces help maintain the shape of the droplet as the molecules stick together. This principle is vital for various biological processes, such as the movement of water through plants and the transport of nutrients in living organisms. Cohesion plays a key role in maintaining the structure and function of various biological systems.