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Cambridge IGCSE Biology practice

Paper 3 structured question: Leaf structure

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Leaf structure

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Paper 3Theory (Core)2 marks

Diagram of a dicotyledonous leaf showing various parts.

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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Paper 3 structured question: Leaf structure

Paper 3Theory (Core)2 marks

Description

Vascular Bundles in a Dicot Leaf

Vascular bundles contain xylem and phloem tissues. Xylem transports water and minerals, while phloem transports sugars produced by photosynthesis.

  1. a

    Identify the tissue that transports water in the leaf.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State the function of the spongy mesophyll.

    Aim for approximately 1 distinct marking point.

    [1]