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Cambridge IGCSE Biology practice

Paper 3 structured question: Water uptake

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Water uptake

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Paper 3Theory (Core)2 marks

Root hairs increase the surface area of roots to improve absorption.

Description

Root Hair Function

Root hairs are microscopic extensions of root epidermal cells that increase the root's surface area.

  1. a

    Identify two substances absorbed by root hairs.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: Water uptake

Paper 3Theory (Core)2 marks

Diagram Description

Root Hair Diagram

A diagram shows a root with many small root hairs extending into the soil.

  1. a

    State why the extensive surface area of root hairs helps the plant.

    Aim for approximately 2 distinct marking points.

    [2]