The highest optical density of the SW-N condition occurs closest to which incubation time?
The bacterial strain SN2 (Alteromonas naphthalenivorans) is known to contaminate both tidal flats and seawater. The graphs in Figure 1 show the results of an experiment intended to measure the cell growth of SN2 in a tidal flat environment with added Naphthalene (TF-N) and a tidal flat environment with added Pyruvate (TF-P). The concentration of Naphthalene and Pyruvate were also measured within this experiment. Additionally, changes in the optical density of seawater was measured when both Naphthalene and Pyruvate were added. The goal of this experiment was to better understand the Eco physiological behavior of SN2 in contaminated environments. The graphs in Figure 2 depict levels of correlation in level of gene expression between conditions.
Figures adapted from Genome-wide transcriptional responses of Alteromonas naphthalenivorans SN2 to contaminated seawater and marine tidal flat sediment by Hyun mi Jin et al.
(C) The highest optical density in the SW-N period occurs closes to 16 hours. Consider only the bottom graph of Figure 1 and the points that are shaded white. Though measurements taken past 20 hours, values peaked closest to 16 hours of incubation.