简答题\n Greater than _____ difference in 16S rRNA gene sequence should be considered a different genus. A、5-7% B、7-10% C、10-12% D、30%\n简答题\n The endosymbiotic uptake of an oxygenic phototrophic bacterium would have conferred photosynthetic properties on a primitive eukaryote, so it need rely no longer on organic compounds for energy production. The bacterium was the forerunner of the modern__________. A、Golgi apparatus B、Mitochondrion C、Ribosome D、Chloroplast\n简答题\n The short oligonucleotides unique to certain groups of organisms can be called _____. A、16S rRNA B、Phylogenetic probes C、Signature sequence D、None of the answers\n简答题\n The forerunner of the modern_______ is an aerobic chemoorganotrophic bacterium that established stable residency within the cytoplasm of a primitive eukaryote and supplied the latter with energy in exchange for a protected environment and a ready supply of nutrients. A、Ribosome B、Chloroplast C、Mitochondrion D、Golgi apparatus\n简答题\n Phylogenetics is the study of phylogeny, or family history of microbes, so phylogenetics is A、Genotype-based B、Phenotype-based C、Both Phenotype-based and Genotype-based D、None of the answers\n简答题\n The taxonomic hierarchy of organisms are in the following order A、Domain-Kingdom-phylum-Class-Order-Family-Genus-Species B、Domain-Kingdom-Order-Family-Genus-phylum-Class-Species C、Domain-Order-Family-Kingdom-phylum-Class-Genus-Species D、Domain-Kingdom-phylum-Order-Family-Class-Genus-Species\n简答题\n Mitochondria and chloroplasts contain small amounts of RNA arranged in a covalently closed, circular form. A、True B、False\n简答题\n A prokaryote whose 16S rRNA sequence differs by more than ______ from that of all other organisms should be considered a new species. A、1% B、3% C、5% D、10%\n简答题\n Strong evidence supports that the modern eukaryotic cell evolved in steps through the stable incorporation of chemoorganotrophic and phototrophic symbionts from the domain__________. A、Bacteria B、Archaea C、Eukarya D、None of the answers\n简答题\n Both chloroplasts and mitochondria contain ribosomes. A、True B、False\n