Transportation in plants

Question 1

xylem

Answer 1

a plant tissue made up of dead empty cells joined end to end; it transports water and mineral ions and helps to support plants

Question 2

Phloem

Answer 2

a plant tissue made up of living cells joined end to end and it transports substances made by the plant, such as sucrose and amino acids

Question 3

lignin

Answer 3

a hard, strong, waterproof substance that forms the walls of the xylem vessels

Question 4

transpiration

Answer 4

the loss of water vapour from leaves

Question 5

transpiration pull

Answer 5

a force produced by the loss of water vapour from a leaf, which reduces the pressure at the top of the xylem vessels

Question 6

Wilting of a plant

Answer 6

Losing more water than it can take up so the cells lose their turgidity

Question 7

Translocation

Answer 7

the movement of sucrose and amino acids in phloem from sources to sinks

Question 8

Sink

Answer 8

part of a plant to which sucrose or amino acids are being transported, and where they are used or stored

Question 9

Source

Answer 9

Part of a plant releases sucrose or amino acids to be transported to other parts