B4 Organising animals and plants Flashcards
1
Q
what is the xylem
A
tissue that transports water from roots to leaves
2
Q
what is the phloem
A
tissue that transports sap up and down a plant from leaves by translocation
3
Q
what is the stomata
A
small holes in the underside of the leaf that allows movement of gasses in and out of the leaf
4
Q
what are guard cells
A
cells that control the side of stomata. when they are turgid they become crescent shaped and open the stomata. when they’re flaccid they lose their crescent shape and close the stomata
5
Q
what is transpiration
A
evaporation of water from the stomata in windy hot and dry conditions
6
Q
what is translocation
A
movement of sap between phloem cells
7
Q
what is a potometer
A
equipment used to indirectly measure transpiration by the movement of an air bubble
