B2.2.4 Plant Transport Systems

Question 1

What does xylem tissue transport

Answer 1

Water and mineral ions from roots to stems leaves and flowers
Water diffuses into roots by osmosis
Mineral ions are taken in by active transport

Question 2

Hat does phloem tissue transport

Answer 2

Dissolved sugars produced during photosynthesis and other soluble food molecules from leaves to all other areas of plant
Translocation

Question 3

Phloem and xylem tissue form the structure known as

Answer 3

A vascular bundle

Question 4

Structure of xylem

Answer 4

Vessels made from dead xylem cells
No cell walls at the end of these cells forming tubes through which the water and dissolved mineral ions can flow
The rest of the xylem cellulose wall is thickened to help provide support

Question 5

Structure of phloem

Answer 5

Made of living cells
Cell walls don’t fully break down- sieve plates are formed- small holes in the end wall which allow dissolved sugars to pass through

Question 6

How do the vascular bundles provide support

Answer 6

In the leaf they form a network that supports the softer leaf tissue
In the stem they’re located around the outer edge, providing the stem with strength to resist bending in the breeze
In the root they’re found in the centre, enabling the root to act as an anchor- the root can bend as the plant moves in the wind