Plant Tissues, Organs & Systems (AQA GCSE Biology): Flashcards
📚Flashcards
Practise the cards
14 cards from this deck
ShowHide
Practise the cards
14 cards from this deck
What is transpiration?
What is transpiration?
Loss of water from plants
Transpiration stream
Transpiration stream
Flow of water from roots to leaves through plant
How water enters roots
How water enters roots
By osmosis from soil
Xylem vessels
Xylem vessels
Tubes carrying water up stem from roots to leaves
Stomata
Stomata
Tiny holes mainly on undersides of leaves
Guard cells role
Guard cells role
Control opening and closing of stomata
Guard cells when stoma opens
Guard cells when stoma opens
Become swollen and curved
Guard cells when stoma closes
Guard cells when stoma closes
Become flatter and less curved
What transpiration stream carries
What transpiration stream carries
Water and dissolved mineral ions
Temperature effect on transpiration
Temperature effect on transpiration
Higher temp increases evaporation rate
Humidity effect on transpiration
Humidity effect on transpiration
Dry air increases transpiration rate
Wind effect on transpiration
Wind effect on transpiration
Moving air removes water vapour, increases rate
Light effect on transpiration
Light effect on transpiration
Bright light opens stomata more, increases loss
Where most water loss occurs
Where most water loss occurs
Bottom surface of leaves (where most stomata are)