Biology > Edexcel > 2022 pearson june booklet + mark scheme Edexcel International GCSE (9–1) 4HB1/02R Human Biology UN (All)
2022 pearson june booklet + mark scheme Edexcel International GCSE (9–1) 4HB1/02R Human Biology UNIT: 4HB1 PAPER: 02R
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Answer ALL questions. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 A st... udent investigates whether there is more carbon dioxide in expired air than in inspired air. This is the apparatus the student uses. glass T piece bungs with glass tubing rubber tubing conical flasks beaker containing indicator The apparatus is not drawn to scale. *P70950A0324* Turn over 3 (a) Draw a diagram to show how the apparatus should be put together for the investigation. (3 [Show More]
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