Transport of Water and Minerals (Leaving Cert Biology): Flashcards
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15 cards from this deck
Mineral needed for chlorophyll formation
Mineral needed for chlorophyll formation
Magnesium (Mg)
Mineral needed for middle lamella formation
Mineral needed for middle lamella formation
Calcium (Ca)
What nitrates are needed for
What nitrates are needed for
DNA replication
Active transport definition
Active transport definition
Movement from low to high concentration against concentration gradient, needs energy
How water enters root hairs
How water enters root hairs
Osmosis
Three adaptations of root hairs
Three adaptations of root hairs
Large surface area, thin walls, no cuticle
Two mechanisms moving water up xylem
Two mechanisms moving water up xylem
Root pressure and cohesion-tension model
Is root pressure alone enough for tall plants?
Is root pressure alone enough for tall plants?
No, not enough
Cohesion definition
Cohesion definition
Force of attraction between similar molecules
Transpiration definition
Transpiration definition
Loss of water vapour from aerial parts of plant
What strengthens xylem walls?
What strengthens xylem walls?
Lignin
What controls stomata opening/closing?
What controls stomata opening/closing?
levels (not light)
Effect of low on stomata
Effect of low on stomata
Stomata open
Effect of high on stomata
Effect of high on stomata
Stomata close
Gas excreted by plants via stomata
Gas excreted by plants via stomata
Oxygen (by-product of photosynthesis)