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Learning objective

In diagrams and images, recognize the following components of a dicotyledonous leaf: chloroplasts, cuticle, guard cells, stomata, upper and lower epidermis, palisade mesophyll, spongy mesophyll, air spaces, vascular bundles, xylem, and phloem.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE BiologyPlant nutritionCore content

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Quick explanation

In diagrams and images, recognize the following components of a dicotyledonous leaf: chloroplasts, cuticle, guard cells, stomata, upper and lower epidermis, palisade mesophyll, spongy mesophyll, air spaces, vascular bundles, xylem, and phloem

  • This point belongs to Leaf structure, especially Leaf structure outcomes.
  • You need to be able to in diagrams and images, recognize the following components of a dicotyledonous leaf: chloroplasts, cuticle, guard cells, stomata, upper and lower epidermis, palisade mesophyll, spongy mesophyll, air spaces, vascular bundles, xylem, and phloem.
  • The key ideas to know are Identify.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Identify

Why it matters

This objective helps connect Leaf structure outcomes to exam-style questions, flashcards, and revision notes for Leaf structure.

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Paper 3 structured question: Leaf structure

Paper 3Theory (Core)2 marks

Diagram Description

Dicotyledonous Leaf Diagram

A labelled diagram shows the upper epidermis, palisade mesophyll, spongy mesophyll, lower epidermis, stomata, guard cells, cuticle, vascular bundle, xylem, and phloem.

  1. a

    Identify the part of the leaf where most photosynthesis occurs.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State the function of guard cells.

    Aim for approximately 1 distinct marking point.

    [1]
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