10. A) Based on the information in the article, what kind of changes have taken place in the red blood cells of a person with sickle-cell anemia? (Give at least two changes.) (2 points)

Explanation:

The shape of the blood cell is sickle unlike the red blood cell that is oval or ameoboid this shape allows for the low intake of oxygenated blood that is needed in the body.

Sickle blood does not last long in the blood system it takes just about 10days while the red blood cell last about 165 days in the system there a sickle cell individual blood must be regenerated and recycled in about every 10days

Mutation in the blood cell is the major challenge of an individual with sickle cell anaemia.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.