Which of the following is an exception to the central dogma?
A) the discovery of RNA viruses that synthesize DNA using reverse transcriptase
B) the discovery that the Archaea and Bacteria are more distantly related than are Archaea and Eukarya
C) the discovery of ribozymes
D) the discovery of DNA as the unit of genetic inheritance
Answer: A
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Your patient becomes sick due to an infection by the influenza virus and now has the flu. The cells which would most directly lyse virally infected host cells in this case are ____. These cells mature in the _____.
A. T cells, bone marrow B. B cells, thymus C. T cells, lymph nodes D. B cells, spleen E. T cells, thymus
After his return to England, Darwin pondered which of the following questions most heavily?
a. What could explain the great numbers and variety of species? b. Does the fossil evidence support uniformitarianism? c. Are the extinct and living armadillos the same species? d. Did Galápagos mockinbirds have a common mainland ancestor? e. Will natural selection work in England?
What proteins move the chromosomes around during cell division?
What will be an ideal response?
A mushroom is
A) composed of many threadlike filaments called mycorrhizae. B) specialized to obtain most of the nutrients for the fungal mycelium. C) an independent stage in the alternation of generations of the fungal life cycle. D) an aboveground reproductive structure connected to a mycelium.