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structure and function of plants - Coggle Diagram
structure and function of plants
development in theories and models
plant structure
plant function
photosynthesis
process of organisms absorbing sunlight to synthesis nutrients from carbon dioxide and water
carbon dioxide + water + energy (sunlight) --> glucose + oxygen
6CO2 + 6H20 + (energy) --> C6H1206 + 602
transpiration-cohesion-tension theory
Transpiration
water is drawn up the xylem tubes to replace the water evaporated from the leaves. This creates negative pressure or tension at the leaves. This negative pressure creates a suction and pulls the water up.
Cohesive
forces between the water molecules as they are polar. The water molecule has one slightly negative end and the other is slightly positive therefore the water molecules in the stream are attracted to one another forming a continuous stream drawn up through the xylem
cohesion
forces of water molecules attract them to each other which allows a long column of water to stay attached.
Adhesive
forces between water and the walls of the xylem vessels cause water to rise up the walls.
scientists
Jan Baptista van Helmont
Joseph Priestly
Jan Ingenhouz