Title Biology P22 qp .pdf ✅

[Turn over Cambridge International AS & A Level DC (WW/CB) 345288/4 © UCLES 2025 This document has 24 pages. Any blank pages are indicated. BIOLOGY 9700/22 Paper 2 AS Level Structured Questions February/March 2025 1 hour 15 minutes You must answer on the question paper. No additional materials are needed. INSTRUCTIONS ● Answer all questions. ● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs. ● Write your name, centre number and candidate number in the boxes at the top of the page. ● Write your answer to each question in the space provided. ● Do not use an erasable pen or correction fluid. ● Do not write on any bar codes. ● You may use a calculator. ● You should show all your working and use appropriate units. INFORMATION ● The total mark for this paper is 60. ● The number of marks for each question or part question is shown in brackets [ ]. *9874981892* , , * 0000800000001 * ¬O> 4mHuOaE]|6W ¬_¬rNsoep{1..bz ¥EU55eU5 U¥ U
2 © UCLES 2025 9700/22/F/M/25 BLANK PAGE * 0000800000002 * , , ĬÍĊ3⁄4Ġ ́íÈõÏĪÅĊàú ̧þ× ĬßĪñÏĩ÷ęÎāýÎĆÈĒÂĘĂ ĥÅÕÕõÕĥμåõÕÅąĕąÕåÕ DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN
3 © UCLES 2025 9700/22/F/M/25 [Turn over 1 Smilax china is a herbaceous plant. Fig. 1.1 shows part of a transverse section of a root of S. china with root hair cells visible. X Y root hair cell ×84 Fig. 1.1 (a) Name the type of microscope that has been used to obtain the image in Fig. 1.1. ............................................................................................................................................. [1] (b) Calculate the actual length, in micrometres (μm), of the root hair cell labelled in Fig. 1.1. Use the image length of the root hair cell along line X–Y in your calculation. actual length = ....................................................μm [1] (c) Root hairs are important adaptations of root hair cells for the uptake of water. Explain one way in which root hairs adapt root hair cells for the uptake of water. ................................................................................................................................................... ................................................................................................................................................... ............................................................................................................................................. [1] * 0000800000003 * , , ĬÏĊ3⁄4Ġ ́íÈõÏĪÅĊàü ̧þ× Ĭßĩò×ğûĩë÷ôěÒ°ÆÂĨĂ ĥÅåĕμμąÕμąąÅąõĥĕμÕ DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN DO NOT WRITE IN THIS MARGIN