What process is used to clone animals like the famous sheep "Dolly"?
A) gene therapy
B) using a gene gun
C) stem cell research
D) nuclear transfer
D
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The presence of a nonmutant gene on one chromosome often masks the effect of a mutant allele for that same gene on its homologous chromosome
A. true B. false
A viral species is found to infect host fishes in isolated mountain lakes. The host range is
A. the one or more infected species of fishes that exhibit the viral disease symptoms. B. All of the answer choices are correct. C. the specific sizes and shapes of the fish tissue cells that become infected by the viruses. D. the mountainous area, in which the isolated lakes are found and mapped. E. impossible to determine, because the isolated lakes don't allow tests for the infection of other fishes.
Most of a carrot, which is adapted for carbohydrate storage, is
A) pericycle. B) endodermis. C) xylem. D) phloem. E) cortex.
Members of the genus Staphylococcus are normally associated with ________.
A. mucous membranes B. skin glands C. skin D. All of the choices are correct.