■ Why do eukaryotic cells need to be larger than prokaryotic cells?
■ What factor limits the size of free-living cells?
The basic unit of length is the meter (m), and all other units are fractions of a meter.
nanometer (nm) = 10-9 meter = .000000001 meter micrometer (^m) = 10-6 meter = .000001 meter millimeter (mm) = 10-3 meter = .001 meter 1 meter = 39.4 inches
These units of measurement correspond to units in an older but still widely used convention.
1 angstrom (Â) = 10-10 meter 1 micron = 10-6 meter
Figure 1.13 Sizes of Organisms and Viruses
Limit of visibility
Relative sizes of organisms and viruses
Light microscope t
Adult roundworm Helminth
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