Provide a detailed description of the relevant aspects of stem and root anatomy. Describe some of the fundamental tradeoffs involved in water conduction. Assigned reading Purves et al. Cohesion in water is a result of H-bonding. Cohesion contributes to the transport of water against gravity.
Water has high surface tension.
Diffusion is the result of thermal motion. This is a kind of passive transport. If there is a membrane that won't let a solute pass, the solvent molecules will flow until the concentration is the same on both sides. The pressure needed to keep the volumes the same is the osmotic pressure. Water flows from lower to higher osmotic pressure.