In Figure 1, what is the relationship between Pyruvate concentration and Naphthalene concentration?

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.

Science lesson Science Practice Test 9 exam questions 1. question pragraph

Figure 1

Science lesson Science Practice Test 9 exam questions 1. question pragraph

Figure 2

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.

As Pyruvate decreases, Naphthalene increases.

As one decreases, the other does as well.

As Pyruvate increases, Naphthalene decreases.

There is no clear relationship between concentrations of Pyruvate and Naphthalene in Figure 1.

(B) As one decreases, the other does as well. Consider only the top graph in Figure 1. The trend in the strain SN2 in both conditions should be ignored given the question inquires about concentrations of Pyruvate and Naphthalene specifically. The dashed lines indicate change in their concentrations.

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