Flashcards in Transport In Plants Deck (10):
What does the phloem transport?
Sucrose and amino-acids
(Between leaves and other parts of the plant).
What does the xylem transport?
Water and mineral salts.
(From roots to other parts of the plant).
Supported, hollow dead cells.
What is transpiration?
Evaporation of water from the surface of the plant.
How is transpiration affected by change in humidity?
It’s easier for water to evaporate into dry air rather than saturated air.
How is transpiration affected by light intensity?
The stomata open wider (to allow more CO2 in for p/s)
How is transpiration affected by wind?
The water vapour is removed quickly by air movement, speeding up diffusion of more water vapour out of the leaf.
How is transpiration affected by temperature?
Quicker!! (In higher temperatures).
Evaporation and diffusion are quicker in higher temperatures.
Describe and exp. to find out the rate of transpiration from a leafy shoot.
Put the leafy shoot in the capillary tube.
Have an air bubble in the capillary tube.
Measure how much the bubble moves ins set amount of time.
Definition of osmosis.
Movement of water molecules across a semi-permeable membrane.