Question

moving beyond a simple \present or absent\ designation, researchers created a new classification system that allows for a nuanced understanding of bioluminescence in marine organisms that was unavailable under binary classification systems. the new six - point scale considers varying levels of supporting evidence used to identify bioluminescent species. for example, the firefly squid scores 1 because of inconsistent reports, the emperor squid scores 4 because of its anatomical similarity to known luminous relatives, and the sharky anglerfish scores 6 because of substantiated direct observations. which choice best describes the function of the underlined sentence in the text as a whole? a. it emphasizes the thoroughness of the research conducted. b. it explains how the new classification system was derived from the previous binary system. c. it justifies the need for a new classification system for marine species. d. it explains the basis for the new systems scoring criteria.

Explanation:

The underlined sentence "Point - scale considers varying levels of supporting evidence used to identify bioluminescent species" is about the basis of the new system's scoring criteria. It explains what the new six - point scale takes into account (varying levels of evidence) which is the basis for how species are scored. Option D is correct as it directly relates to the basis of the scoring criteria. Option A is about the thoroughness of research which is not the focus of the underlined sentence. Option B is about derivation from the previous system which is not indicated. Option C is about justifying a new system which is not the main point of the underlined sentence.

Answer:

D. It explains the basis for the new system's scoring criteria.