An organism grown in nutrient rich broth to high turbidity always produces a blue pigment. when a large inoculum is transferred to a nutrient rich agar plate, it also appears blue. a researcher noticed that this never happens when very small colonies are grown on low nutrient agar plates, however. what is the most plausible conclusion? the strong gradient from very high to low nutrient bioavailability induces production of the blue metabolite. production of the blue pigment production is linked to quorum sensing. only high nutrient conditions provide enough energy for cells to produce this secondary metabolite that appears blue. large populations enabled the differentiation of a subpopulation of cells that created the blue pigment. 2 points

(me out over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences: -the fossil record shows that different types of organisms have existed at different times in earth's history. -many organisms have similar body structures that seem to be adapted to different ways of living in their environment. -organisms of different species often share similarities in stages of embryonic development. -many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins. -often, the extent of two species' similarities can be predicted from their geographic closeness to each other. -a great deal of change has been observed among species that have experienced strong selective pressures through many generations. scientists have carefully considered and rigorously tested the observations listed above. when scientists offer a of these observations, they are making 1.) testable explanation, deductive explanation 2.) scientific interference, scientific law