Why did Darwin say the flinches on the Galápagos Islands were new species of finches ?

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

Match each symbol with its description.

What happens when a scientific theory is shown to be an accurate description of a phenomenon?