Some viral pathogens evade detection by the vertebrate immune system by a mechanism that most likely involves what process?
A. Becoming a symbiont
B. Becoming metabolically inactive
C. Becoming a spore
D. Becoming nonvirulent
E. Frequent changing of surface antigens
Answer: E
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A researcher is comparing the species diversity of two islands. Both islands are roughly equal in size. However, one island is much closer to the mainland
She determines that the S value for the island closer to the mainland is ____________ the S value for the island located farther from the mainland. In addition, she finds that the closer island's extinction rate is _______________ the extinction rate on the farther island. A. higher than; lower than B. lower than; higher than C. higher than; the same as D. lower than; the same as E. the same as; higher than F. the same as: lower than
Glycolysis, pyruvate oxidation, and the citric acid cycle all have this molecule in common as one of
their products.
a. CO2 b. H2O c. ATP d. FADH2 e. NADH
Small, hollow membrane vesicles used to deliver therapeutic genes for gene therapy are called ________
A) liposomes B) gold particles C) retroviruses D) biocapsules E) None of these choices
According to one of the main hypotheses for the origin of life, what must have come first?
A. abiotic synthesis of organic monomers B. joining of small molecules to produce macromolecules C. packaging of molecules into pre-cells D. formation of replicating molecules that made inheritance possible