Mutant Fruit Flies That Do Not Make Toll Protein Were

Multiple Choice

Mutant fruit flies that do not make Toll protein were tested for survival after fungal infection. The results shown in the accompanying graph support the hypothesis that ________.

A) Toll protein is necessary for protection from death by fungal infection
B) after fungal infection, wild-type flies die more rapidly than mutants lacking the Toll protein
C) flies lacking the Toll protein die within one day of a fungal infection
D) Toll proteins have a delayed affect in killing flies