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Why are so many organisms symmetrical?
Asked by Hobbes (7371)
February 9th, 2011
Most plants and animals seem to display bilateral symmetry. There are some exceptions (Wikipedia lists sponges) but it seems to be more or less the norm. Why? What is the benefit of symmetry? Why bilateral symmetry as opposed to radial symmetry? Would it be reasonable to expect any alien life we might discover to also be symmetrical?
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