Once dna was shown to be the primary genetic material of life, a race among scientists took place to work out its structure. which concept came from studying the amounts of each dna base in different organisms?

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

9. the history of life on earth is recorded in

This rapid change in species that rarely leaves behind fossil evidence is referred to as