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Relative Sizes

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Updated 2009-02-04 22:05

Relative Sizes of Different Biological Entities

EntityLength/Height in meters (m)
Redwood Tree3x101 to 102
Beech Tree101 to 3x101
Buttercup Flower3x10-2 to 10-1
Unicellular Algae3x10-4 to 10-3
Animal Cells10-6 to 6x10-4
Bacteria10-7 to 3x10-6
Viruses10-8 to 10-7
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Method to ObserveLength/Height in meters (m)
Human Eye (no magnification)6x10-4 to 103
Light Microscope (magnified 10-1000 times)6x10-7 to 6x10-4
Electron Microscope (magnified 1000-1,000,000 times)10-10 to 6x10-7
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Reference: p.185 of "Usborne Essential Guides: Essential Science" by P. Wingate, C. Gifford, R. Treays. EDC Publishing, Tulsa, Oklahoma. ISBN=0-7460-1011-7.