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The material acknowledged below is Proprietary, used under licence and not subject to Creative Commons licence. See terms and conditions. Grateful acknowledgement is made to the following:
Figure 2b: Dr Gopal Murti/Science Photo Library;
Figure 3: Courtesy of Heather Davies, Department of Life, Health and Chemical Sciences, Open University;
Figure 10: Dr Torsten Wittmann/Science Photo Library;
Figure 11a, 17a, 19a and 22a: Courtesy of Professor Michael Stewart, Department of Life, Health and Chemical Sciences, Open University;
Figure 12: Adapted from Purves, W.K. et al. (1998) Life, the Science of Biology, 5th edn, Sinauer Associates Inc;
Figure 14: Dr Richard Kessel and Dr Gene Shih, Visuals Unlimited/Science Photo Library;
Figure 16: Photo printed with permission from O. L. Miller, B. A. Hamkalo and C. A. Thomas Jr;
Figure 21a: CNRI/ Science Photo Library;
Figure 21b: Dr Don Fawcett/Science Photo Library;
Figure 22c: Dr Gopal Murti/Science Photo Library;
Figure 24: Courtesy of Jill Saffrey, Department of Life, Health and Chemical Sciences, Open University.
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