Scientists grow spherical clusters of identical animal cells in a liquid containing oxygen. Oxygen enters each cluster only across its outer surface.
The clusters have the same cell density but different diameters.
Which statement explains why cells in a larger cluster are less likely to receive enough oxygen?
Surface area increases with the square of diameter, while volume and total oxygen demand increase with the cube.
Surface area and volume increase with the square of diameter, while total oxygen demand increases with the cube.
Surface area and volume increase with the cube of diameter, while total oxygen demand increases with the square.
Surface area increases with the cube of diameter, while volume and total oxygen demand increase with the square.
114 exam-style questions on OCR GCSE Biology 2.2 The challenges of size, covering 2.2.1 Exchange surfaces and surface area : volume ratio, 2.2.2 Substances transported in organisms, 2.2.3 The human circulatory system, 2.2.4 The heart and blood vessels, 2.2.5 Red blood cells and plasma, 2.2.6 Uptake of water and mineral ions by plants, 2.2.7 Transpiration and translocation, 2.2.8 Xylem and phloem, 2.2.9 Environmental factors and water uptake, and 2.2.10 Using a potometer. Each one has a worked solution and a mark scheme showing where the marks go.