Cambridge IGCSE Biology practice

Paper 4 structured question: Xylem and phloem

Try the question first, then check the answer and practise the same topic again.

At a glance

Paper

Marks

Topic

Xylem and phloem

Exam-style question

Try this first

Paper 4Theory (Extended)3 marks

Xylem vessels are specialized structures in plants that transport water from roots to leaves.

Diagram Description

The diagram shows xylem vessels with thick walls, no cell contents, and cells joined end to end without cross walls.

a
State one way in which the thick lignified walls of xylem vessels help their function.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Identify two structural features of xylem vessels that allow continuous water flow.
Your answer
Aim for approximately 2 distinct marking points.
[2]

0 of 2 parts answered

Answer every part before opening the mark scheme.

Common mistake

No common mistake is linked to this question yet.

Flashcard 1 of 6

Press Space to flip, arrows to move

Paper 4Theory (Extended)2 marks

Description

Xylem vessels have thick lignified walls, lack cell contents, and are arranged end to end without cross walls.

a
State why the absence of cell contents is important for xylem vessel function.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
Identify the function of the thick lignified walls in xylem vessels.
Your answer
Aim for approximately 1 distinct marking point.
[1]