(4) With the exception of hoses used to extinguish fires, any hose connected to. a fire hydrant must be equipped with either an approved backflow prevention. device or an approved four (4) inch air gap, unless in the Department's opinion, the application does not pose a backflow hazard, such as watering a community.
What was most likely the cause of Marie Curie's leukemia? a. Radiation c. Pollution b. Smoking d. Genetics. a. Radiation was most likely the cause of Marie Curie's leukemia.
Feline Leukemia is a disease caused by the Feline Leukemia Virus (FeLV). The Leukemia itself is a cancer of the cat's lymphocytes (white blood cells). What FeLV does is it produces an enzyme which permits it to make and insert copies of its genes into cells it infects. When it infects the white blood cells it suppresses the immune system.