Rheumatoid factor (RF) is a blood test that measures the amount of the RF antibody in the blood.
Weight ranges from about 7 to 12 kilograms (15 to 26 lb) in females, and from 9 to 18 kilograms (20 to 40 lb) in males.[4] Where does a serval live? The Serval lives in Africa.
The live weight of an Archelon ischyros is estimated at more than 2200 kg and they probably had a very strong bite, and were optimized for feeding on pelagic mollusks such as squid. The specimen exhibited by the Museum of Natural History in Vienna is estimated to have lived to be a century old, the fossil turtles of North America.