Plant Transport

Question 1

What do xylem vessels transport?

Answer 1

Water and mineral ions

Question 2

What do phloem vessels transport?

Answer 2

Sugars produced by photosynthesis

Question 3

What are vascular bundles?

Answer 3

Groups of phloem, xylem and support tissue found in stems and roots of plants

Question 4

What is the transport mechanism in plants?

Answer 4

Mass flow

Question 5

Explain how xylem vessels form?

Answer 5

Lignin laid down inbetween cellulose fibres in the cell wall
Impermeable so cytoplasm dies
End walls break down

Question 6

Explain how the structure of xylem makes it suitable for transport?

Answer 6

Dead empty vessels - wide lumen so unrestricted water flow
End walls break down - long continuous tube
Lignified cell walls - vessels dont break down under tension
Pits

Question 7

What are pits?

Answer 7

Areas with no lignin which allow for the lateral movement of water

Question 8

What are tracheids?

Answer 8

Smaller, narrower xylem cells with tapered ends found in less advanced plants

Question 9

What are parenchyma?

Answer 9

Living plant cells with no thickening

Question 10

What are xylem fibres?

Answer 10

Narrow and thick plant cells with a small lumen

Question 11

What are xylem fibres used for in plants?

Answer 11

Structure/support