Cambridge IGCSE Biology practice

Paper 3 structured question: Tropic responses

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

At a glance

Paper

Marks

Topic

Tropic responses

Exam-style question

Try this first

Paper 3Theory (Core)2 marks

Phototropism is a plant response where certain parts grow towards or away from a light source.

Description

Plants often grow towards light to maximize photosynthesis. This growth response is called phototropism.

a
Describe what phototropism is in plants.
Your answer
Aim for approximately 2 distinct marking points.
[2]

0 of 1 part 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 3Theory (Core)3 marks

Diagram Description

A diagram shows a plant stem bending towards a light source. The shaded side cells are longer than the side facing the light.

a
Identify which side of the stem has longer cells during phototropism and explain why.
Your answer
Aim for approximately 3 distinct marking points.
[3]