OCR A Level Biology A lesson on The Requirements for Specialised Exchange Surfaces and their features. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces.
Specification points: 3.1.1 (a) and (b)
Objectives for this lesson:
• Describe the features of an efficient exchange surface.
• Calculate the surface area to volume ratio.
• Explain the need for specialised exchange surfaces in both unicellular and multicellular organisms.
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