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.
Ureter, the structure that carries urine from the kidney to the bladder is called Ureter
A mutation could do that.
<span>The purpose of the Human genome Project was to find the nucleotide sequence of the human genome and to also map the locations of where they are on the chromosomes. They accomplished finding how gene expressions is controlled as well as predicting disorders and now they have also developed gene therapy.</span>
