IGCSE Biology (0970) — October–November 2024, Paper 42

6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.

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Question 1 · 17 marks · Classification

Organisms from the genus Chlorella are protoctists. State the additional information required to name Chlorella according to the binomial system.

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Question 2 · 15 marks · Gas exchange

Fig. 2.1 is a diagram of the gas exchange system in humans showing: trachea at top, two lungs, with parts labelled X (bronchus/bronchiole), Y (alveoli cluster), and Z (diaphragm…

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Question 3 · 18 marks · Excretion

Fig. 3.1 shows a kidney nephron and its associated blood vessels. The glomerulus is visible at the top. Fluid A flows through the nephron (indicated by arrows). Part A is labelled…

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Question 4 · 11 marks · Reproduction

Fig. 4.1 shows a diagram of two flowers from different plants of the same species. Part X is labelled on the carpel/stigma. Part Y is labelled on the sepal. Describe what is meant…

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Question 5 · 11 marks · Inheritance

Fig. 5.1 is a pedigree diagram showing the inheritance of blood group in one family. Individual 1 (male, blood group B) and individual 2 (female, blood group A) are parents. Their…

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Question 6 · 8 marks · Ecosystems

The flow chart in Fig. 6.1 shows one pathway of nitrogen as it travels through the nitrogen cycle. Complete the flow chart in Fig. 6.1: nitrogen in the atmosphere → nitrogen…

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