OCR 2023 Biology A H020/02: Depth in biology AS Level Question Paper & Mark Scheme (Merged)

1 (a) Fig. 1.1 shows two cubes that represent a large and a small multicellular plant. Fig. 1.1 Large multicellular plant Small multicellular plant Length = 2cm Width = 2 cm Depth = 2cm Surface area : volume = 6:1 (i) Using the data provided in Fig. 1.1, calculate the surface area : volume of the large multicellular plant. Surface area: volume = ..........................................................[2] (ii) Explain why a large multicellular plant needs a transport system but a small multicellular plant does not. ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... ...................................................................................................................................... [2] 4 OCR 2023 (b)* Fig. 1.2 shows a diagram of phloem tissue in the stem of a herbaceous dicotyledonous plant. Fig. 1.2 Sieve pore Companion cell Nucleus Cytoplasm Sieve tube element Sieve plate With reference to Fig. 1.2 outline the structure and function of phloem tissue in the stem of a herbaceous dicotyledonous plant. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [6] 5 OCR 2023 Turn over Additional answer space if required. ................................................................................................................................................... ................................................................................................................................................... .....................................................................................