The normal value of a hormone in a species is typically 10-20 units per ml of blood. A test is conducted three times, on an individual with normal hormone values, and the results of the three tests are: 5.2 units/ml, 5.2 units/ml, and 5.2 units/ml. The test lacks:

Due to genetic defects, a family history of hormone imbalances, or certain diseases.

Explanation:

According to the data, the blood is deficient in hormones which is due to a number of factors such as genetic defects, a family history of hormone imbalances, or certain diseases etc. The normal person has  10-20 units of hormones per ml of blood in their body, if the body has low in hormones the body does not perform its function properly that leads to certain diseases such as obesity, osteoporosis, and cardiovascular disease so we can say that genetic defects, hormone imbalances, or certain diseases are the causes of low in hormones.