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OCR Oxford Cambridge and RSA Tuesday 17 May 2022 — Morning GCSE (9-1) Combined Science B (Twenty First Century Science) J260/05 Biology (Higher Tier)

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OCR Oxford Cambridge and RSA Tuesday 17 May 2022 — Morning GCSE (9-1) Combined Science B (Twenty First Century Science) J260/05 Biology (Higher Tier) INSTRUCTIONS • Use black ink. You can u... se an HB pencil, but only for graphs and diagrams. • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 95. • The marks for each question are shown in brackets ( J. • Quality of extended response will be assessed in questions marked with an asterisk C). • This document has 24 pages. ADVICE • Read each question carefully before you start your answer. 1 Answer all the questions. Transpiration takes place in plants. (a) Complete the sentences to describe transpiration. Put a around each correct answer. Water is absorbed I lost I translocated through the stomata in a plant's leaves. This causes sugars I water I water and sugars to move up the meristem I phloem I xylem tissue in the plant's stem. (b) Fig. 1.1 shows one of the stomata from a leaf. Add two labels to Fig. 1.1. Label 1 The pore through which water diffuses. Label 2 Aguard cell. (c) Complete the sentences to describe how to set up a light microscope to look at a slide of stomata from a leaf. Put a@around each correct answer. First, tum to the *41 XIO I objective lens. Use the coarse focus knob to move the objective lens to its lowest I middle I highest position. Then clip the slide onto the eyepiece I objective lens I stage. (21 [Show More]

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