Transport and support in cells

Question 1

xylem vessels function

Answer 1

transports water and mineral ions from the root to the stems and leaves of plants in one direction

Question 2

xylem structure

Answer 2

• thick cell walls with cross walls missing
• form a column of cells acting as tubes for transporting in
• contain lignin to make the cell stiffer and less flexible to increase the tensile strength which reduces its permeability making xylem waterproof
• dead cells

Question 3

phloem function

Answer 3

transports the products of photosynthesis ( glucose ) ,which is first converted to sucrose, from leaves to other parts of the cell

Question 4

phloem structure

Answer 4

made of sieve tubes and companion cells

Question 5

sclerenchyma fibres function

Answer 5

supporting tissue in plants

Question 6

sclerenchyma fibres structure

Answer 6

• cell walls thickened with lignin (thicker and more lignified than xylem)
• have cross walls
• smaller diameter/ lumen than xylem