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Biology, 29.06.2019 17:40 scadengo123
How do the presence of gills and lungs ss well as a bone structure that is homologous to that of tetrapods support the idea that tiktaalik fills in the gap between aquatic and land dwelling species
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Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.
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