Nhận biết (M1)

The Darlington is just one of approximately three million known historical shipwrecks spread throughout the world’s oceans, and their impact on sea life and underwater ecosystems is of great interest to researchers. Rachel Moseley and colleagues were particularly curious about the effects of wooden shipwrecks on seafloor microbial communities. The researchers studied two wooden shipwrecks in the Gulf of Mexico by placing pieces of pine and oak between zero and 200 meters away from each shipwreck to collect samples of three kinds of microbes: bacteria, archaea, and fungi. They found that across the three microbial communities, peak diversity and richness was observed on pine and oak samples placed approximately 125 meters from the shipwrecks.

Which choice best describes the overall structure of the text?

• A.

  It introduces a study of microbial communities near shipwrecks that has received significant scholarly attention, summarizes the results of that study, and then describes a research team’s reaction to the study.

• B.

  It states the number of known shipwrecks, describes the historical significance of one of those shipwrecks, and then comments on the various microbes found at the shipwreck site.

• C.

  It names a famous historical shipwreck, describes the type of wood used to build that ship, and then explains how that wood type influences underwater microbial communities.

• D.

  It notes a general scientific interest in shipwrecks’ ecological effects, describes a specific study related to that interest, and then states one of the study’s findings.