​The graph below shows the accumulation of species in two sites A and B as more plots are sampled.​

Based on this graph, the following statements were made:

A. In both sites, sampling more plots will not add any more species.
B. Sampling more plots will add more species in Site B but not Site A.
C. Sites A and B are likely to have similar species richness.
D. Site B is likely to have higher species richness than Site A.

Which one of the following options contains both statements that are INCORRECT?

Correct option is A

Let’s analyze each statement in the context of the graph:

• Statement A:In both sites, sampling more plots will not add any more species.
  → This is incorrect. Although the curves are flattening, neither Site A nor Site B has reached a complete plateau. The species count is still marginally increasing with additional sampling, meaning more species could be discovered.

• Statement C:Sites A and B are likely to have similar species richness.
  → This is also incorrect. Site A consistently shows a higher number of species across all sampling efforts, and even at the highest number of plots sampled, Site A remains higher than Site B, suggesting Site A is richer.

Thus, A and C are both incorrect statements.