Rabies virus can be directly detected in brain tissue using a(n) ________ assay.
A. viral neutralization
B. direct fluorescent antibody
C. immunodiffusion precipitation
D. viral hemagglutination inhibition
E. immunoblot
Answer: B
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It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that
A. the island forms and mainland forms are converging. B. common environments are inhabited by the same organisms. C. island forms and mainland forms descended from common ancestors. D. island forms and mainland forms have identical gene pools. E. the islands were originally part of the continent.
Quorum Quenching
What will be an ideal response?
A mass of undifferentiated plant cells is called a callus
____________________ Indicate whether the statement is true or false.
Which statement about radioisotopes is FALSE?
a. Potassium-40 has an extremely long half-life. b. Carbon-14 is typically used to date sedimentary rock. c. The ratio of carbon-14 to carbon-12 is used in dating fossils. d. The half-life of a radioisotope does not vary with temperature or pressure. e. The nucleus of a radioisotope can change into that of a different element during decay.