What does cohesion refer to in the context of molecular interactions?

Cohesion refers specifically to the attraction between like molecules. This phenomenon is particularly important in the context of water, where hydrogen bonds cause water molecules to stick together. This property is essential for various biological processes, such as the transport of water in plants and the formation of water droplets. The strong cohesive forces in water contribute to its high surface tension, which allows insects to walk on water and enables the movement of water columns through capillaries in plant roots. This concept is foundational in understanding many biological and ecological systems, illustrating how molecules interact in a significant and impactful way.