Reducing Water Loss (OCR A-Level Biology A): Flashcards
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Practise the cards
10 cards from this deck
Xerophytes definition
Xerophytes definition
Plants adapted to survive in water-limited environments
Why stomata on lower leaf surface?
Why stomata on lower leaf surface?
Lower surface cooler, reduces evaporation rate
Waxy cuticle function
Waxy cuticle function
Waterproof barrier preventing water vapor loss from epidermis
Two ways xerophytic adaptations work
Two ways xerophytic adaptations work
Reduce water vapor gradient OR minimize surface area
How sunken stomata reduce water loss
How sunken stomata reduce water loss
Trap humid air in pits, reducing concentration gradient
Stomatal hairs function in xerophytes
Stomatal hairs function in xerophytes
Trap water vapor, create humid air layer around stomata
How rolled leaves conserve water
How rolled leaves conserve water
Trap humid air inside, reducing diffusion gradient
What are cactus spines?
What are cactus spines?
Modified leaves with minimal surface area
Why stomata close at night
Why stomata close at night
Prevents water loss when photosynthesis can't occur
Hydrophytes definition
Hydrophytes definition
Plants adapted to freshwater where water conservation not needed