1- es el valor aproximado a la medida verdadera

2- para realizarla se coloca la unidad sobre sobre la magnitud desconocida

3- representa un el número de dígitos de los cuales se tienen mayor seguridad en los resultados de mediciones

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