More astonishing than the difference between the length of the lists of Old World's and New World's domesticated animals is the difference between the lengths of the lists of infectious diseases native to the two.
Fetal Hemoglobin Test. Definition. Fetal hemoglobin (Hemoglobin F), Alkali-resistant hemoglobin, HBF (or Hb F), is the major hemoglobin component in the bloodstream of the fetus. After birth, it decreases rapidly until only traces are found in normal children and adults. Purpose.
Best Answer: Water resistant means it can keep out water forms like rain and might be able to keep out water in a pool for a short period of time where water proof means it can withstand large amounts of water for long periods of time. Source(s): nxtgenius Â· 6 years ago.