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 First | Previous | Next | Last | | Index | Home Slide 86 of 109 In conclusion, bipedalism seems to have arisen at a time and place where there was little or no ecological or environmental pressure to have selected for its evolution. Bipedalism appeared suddenly in the fossil record over 5 million years ago. The adaptations necessary to achieve bipedalism are remarkably extensive, and many of the evolutionary models do not provide a mechanism by which intermediates would be selectively advantaged. |
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