Biology Most Commonly Asked Questions Paper 2

Explain why the rate of water loss would be different if a working fan is placed in front of the plant shoot. (3) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 2023 June P-2B DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA 6 The photograph shows a plant called a snapdragon. (Source: © BRIAN GADSBY/SCIENCE PHOTO LIBRARY) Selective breeding has been used to produce snapdragons with brightly coloured flowers. (a) (i) Describe how selective breeding can produce snapdragon plants with brightly coloured flowers. 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(ii) Micropropagation is often used to make copies of a snapdragon plant. Describe the process of micropropagation. (3) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 2023 June P-2B DO NOT WRITE IN THIS AREA (e) Auxin also controls the response of plants to light. Describe a simple experiment you could do to show the phototropic response of plant stems to light. (3) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 2023 June P-2BR DO NOT WRITE IN THIS AREA ( g) Explain why plant cell suspension culture media are maintained under suitable conditions of agitation, light and temperature. (lines 24 and 25) (3) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 2023 June P-2BR THIS AREA DO NOT WRITE IN THIS AREA (c) Root hair cells are specialised cells adapted for their functions. Explain how root hair cells are adapted for their functions in the plant. 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