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Why do bacteria thrive even in hostile environments

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an