OCR GCSE Biology A: Gateway Science (J247) · OCR J247
B2 Scaling up
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Scaling up
- Explain how the structure of a red blood cell is adapted to carry oxygen efficiently aroun… (4 marks, Explain)
- Explain why multicellular organisms need specialised exchange surfaces and transport syste… (4 marks, Explain)
- Explain how the structure of root hair cells makes them well adapted for absorbing water a… (4 marks, Explain)
- Explain how the structure of red blood cells makes them well adapted for carrying oxygen a… (4 marks, Explain)
- Explain how the structure of alveoli makes them well adapted for efficient gaseous exchang… (4 marks, Explain)
- Explain how the structure of phloem is adapted to transport sucrose around a plant. (4 marks, Explain)
- Explain how the structure of xylem vessels makes them well adapted for transporting water … (4 marks, Explain)
- A student compares a small unicellular organism living in pond water with a large multicel… (4 marks, Describe)
- A large multicellular animal, such as a whale, cannot rely on diffusion alone to supply ox… (4 marks, Explain)
- A plant transports water and sugars through two separate transport systems. Describe how t… (4 marks, Describe)