QuestionDecember 14, 2025

10 and other human activities influence carbon and nitrogen levels in will though how deep these effects extend is unclear Hypothesizing that differences in land use lead to differences in carbon and nitrogen levels that are not restricted to the topsoil layer (0-30cmdeep) Chukwuebuka Okolo and colleague sampled soils across multiple land-use types( e.g grazing land cropland, forest) within each of several Ethiopian locations. They found, though that across land-use types, carbon and nitrogen decreased to comparably low levels beyond depths of 30 cm. Which choice best describes the overall structure of the text? A) It describes a phenomenon that scientists do not fully understand, explains a research team's hypothesis about that phenomenon and then describes a finding that led the team to refine the hypothesis. B) It introduces an unresolved scientific question. presents a research team s hypothesis pertaining to that question, and then describes an observation made by the team that conflicts with that hypothesis. C) It discusses a process that scientists are somewhat unclear about, introduces competing hypotheses about that process.and then explains how a research team concluded that one of those hypotheses is likely correct. D) It explains a hypothesis that has been the subject of scientific debate, discusses how a research team tested that hypothesis,and then presents

10 and other human activities influence carbon and nitrogen levels in will though how deep these effects extend is unclear Hypothesizing that differences in land use lead to differences in carbon and nitrogen levels that are not restricted to the topsoil layer (0-30cmdeep) Chukwuebuka Okolo and colleague sampled soils across multiple land-use types( e.g grazing land cropland, forest) within each of several Ethiopian locations. They found, though that across land-use types, carbon and nitrogen decreased to comparably low levels beyond depths of 30 cm. Which choice best describes the overall structure of the text? A) It describes a phenomenon that scientists do not fully understand, explains a research team's hypothesis about that phenomenon and then describes a finding that led the team to refine the hypothesis. B) It introduces an unresolved scientific question. presents a research team s hypothesis pertaining to that question, and then describes an observation made by the team that conflicts with that hypothesis. C) It discusses a process that scientists are somewhat unclear about, introduces competing hypotheses about that process.and then explains how a research team concluded that one of those hypotheses is likely correct. D) It explains a hypothesis that has been the subject of scientific debate, discusses how a research team tested that hypothesis,and then presents
10 and other human activities influence carbon and nitrogen levels in will though how deep these effects extend is unclear Hypothesizing that differences in land use lead to differences in carbon and nitrogen levels that are not restricted to the topsoil layer (0-30cmdeep) Chukwuebuka Okolo and colleague sampled soils across multiple land-use types( e.g grazing land cropland, forest) within each of several Ethiopian locations. They found, though that across land-use types, carbon and nitrogen decreased to comparably low levels beyond depths of 30 cm. Which choice best describes the overall structure of the text? A) It describes a phenomenon that scientists do not fully understand, explains a research team's hypothesis about that phenomenon and then describes a finding that led the team to refine the hypothesis. B) It introduces an unresolved scientific question. presents a research team s hypothesis pertaining to that question, and then describes an observation made by the team that conflicts with that hypothesis. C) It discusses a process that scientists are somewhat unclear about, introduces competing hypotheses about that process.and then explains how a research team concluded that one of those hypotheses is likely correct. D) It explains a hypothesis that has been the subject of scientific debate, discusses how a research team tested that hypothesis,and then presents

Solution
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Answer

B Explanation 1. Identify the Structure of the Passage The passage introduces an unresolved question, states a hypothesis (land use affects deep soil layers), and then presents findings that conflict with the hypothesis (carbon and nitrogen decrease to similar low levels below 30 cm regardless of land use). 2. Match Structure to Choices Choice B matches: unresolved question → hypothesis → observation conflicting with hypothesis.

Explanation

1. Identify the Structure of the Passage <br /> The passage introduces an unresolved question, states a hypothesis (land use affects deep soil layers), and then presents findings that conflict with the hypothesis (carbon and nitrogen decrease to similar low levels below 30 cm regardless of land use).<br /><br />2. Match Structure to Choices <br /> Choice B matches: unresolved question → hypothesis → observation conflicting with hypothesis.
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