Ascientist claimed that hemophilia is caused by a functional deficiency in factor viii. the evidence in the passage that would best support this claim is that factor viii is:
a. a soluble blood protein.
b. produced by a gene on the x chromosome.
c. able to relieve hemophilia symptoms.
d. encoded by a gene that contains introns.

C. able to relieve hemophilia symptoms.

Explanation:

Hemophilia is a genetic disorder. It is an X-chromosome linked recessive disorder. It is caused by deficiency of functional blood clotting factor VIII. The Functional factor VIII al deficiency may be inherited or arise from spontaneous mutation.

The symptoms of hemophilia can be reduced partially by functional Factor VIII. This will help to counter functional deficiencies in factor VIII in the haemophilic individuals.

there's the proffessional site that will you.

not sure if this is what you'r looking for eubacteria and archaebacteria