Amutation in the bacterial regulatory gene that codes for the lac repressor creates a repressor that binds irreversibly to the lac operator. briefly explain what effect, if any, this would have on the bacterium’s metabolism of lactose.

bc blah

explanation:

bc blah

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?