Cetaceans And Evolution
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Title: Cetaceans And Evolution

Essay Details:

Subject: Miscellaneous
Author: Terri M
Date: October 18, 2011
Level:
Grade: A
Length: 3 / 794

Essay text:

Because most cetaceans have some vestigial structures such as under-developed os coxae, the former of these two theories remains prevalent in most researchers minds. The theory that cetaceans evolved from a goat-like being is not at all farcical. The similarities between the skeletal systems are more than coincidental. The only difference is that the cetaceans adapted to a marine lifestyle. The front limbs became modified as paddle-shaped flippers, the bones of which are still reminiscent of jointed limbs and digits, but the hind limbs were lost. The broad horizontal tail flukes that provide the main propulsive thrust bear no anatomical connection to the lost hind limbs, but are a separate and distint development...

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