Passage VI
Scientists established 5 artificial marine ecosystems (A-E) to study the interactions of oil spills and organisms. Table 1 shows what was added to each ecosystem.
The oil, bacteria, fertilizer, lugworms, and flounders were added in early March. Figure 1 shows how the concentration of oil in Ecosystems B, C, D, and E, and the number of bacteria/mL in Ecosystems C and D changed over 16 months.
Figure 2 shows how the number of lugworms/m2 changed over 16 months in each ecosystem.
Figure 3 shows how the biomass of flounders in kilograms/1,000 m3 of water changed over 16 months in each ecosystem.
33. Which of the following conclusions about the effect of oil on flounders in the months following the first month of exposure to oil is supported by Figures 1 and 3?
Your Answer is
Correct Answer is C
Explanation
As can be seen from figure 1, the oil concentration is decreasing, while the biomass of flounders is rising after March, so choose C