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.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

the answer is b: 1.4 km/hr