Deletion experiments of E. coli have determined the minimal set of metabolic pathways. When these path-ways were compared to a closely related species, W. glossinidia, an endosymbiotic organism that obtains resources from its host, researchers found that:
a. the gene sets match perfectly.
b. E. coli was more specialized and had fewer metabolic pathways.
c. W. glossinidia had fewer metabolic pathways.
d. the genomes were not comparable.
e. coli was more specialized and had fewer metabolic pathways.
C
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Of the following, which is the oldest event?
a. origin of fungi b. appearance of land tetrapods c. formation of Pangea d. age of dinosaurs e. appearance of whales
Which of the following events is least likely to result in a genetic change in a bacterium?
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Where is the electron transport chain located?
What will be an ideal response?