Plants with two seed leaves and a branching patterns of veins in the leaf
Cohesion
The attraction between water molecules caused by hydrogen bonds.
Adhesion
The attraction between water molecules and the walls of xylem vessel.
Cohesion - tension theory
Water molecules form hydrogen bonds with each other, causing them to 'stick' together (cohesion). The surface tension of the water also creates this sticking effect. Therefore as water is lost through transpiration, more can be drawn up the stem from the roots.
Hydrophyte
A plant adapted to living in water or where the ground is very wet.
Xerophyte
A plant adapted to living in dry conditions.
Assimilates
Substances that have become a part of the plant.
Sink
Part of the plant where assimilates are removed from the transport system.
Source
Part of the plant that loads assimilates into the transport systems.
Translocation
Transport of assimilates from source to sink which requires metabolic energy (ATP).
