Companion PDF worksheet for Edexcel IGCSE Biology Lecture 27 - Excretion. Contains short answer questions, an activity requiring lateral thinking and exam-style questions.
Specification Point 2.70 - Understand the origin of carbon dioxide and oxygen as waste products of metabolism and their loss from the stomata of a leaf.
Specification Point 2.71 - Know the excretory products of the lungs, kidneys and skin.
Complete set of Chapter 4 Worksheets are available.
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