The combining form that means, "vein":

During the preimplantation stage of development, the fertilized ovum divides and forms a ball-like structure containing undifferentiated cells. If this structure is irradiated with a dose in the range of 0.05 to 0.15 Gyt which of the following will result?

a. Congenital abnormalities b. Delayed bone growth c. Embryonic death d. Microcephaly

FL57 is an alphanumeric field used to identify "other providers." How many characters will this field accommodate?

A. 10 B. 15 C. 20 D. 25