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strojnjashka [21]
3 years ago
14

The fossil record of birds is incomplete because bird skeletons are

Biology
1 answer:
Bogdan [553]3 years ago
7 0
Bird skeletons are very delicate, and therefore, difficult to be preserved.  The bones of the birds are soft. The small animals are very prone to physicochemical as well as biological decay. This is why the fossil record of bird is incomplete and well-preserved fossils of birds are rare to find, except at a few unusual sites. 
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Unequal heating of the earth

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To know more about the Fermentation, click on the below link,

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