Transfers of Energy &Matter (id: 6f5602763)

本题目来源于试卷: Transfers of Energy &Matter，类别为 IB生物学

[单选题]
The diagram illustrates the carbon cycle in a swaoi7i.vjrc2l qrmtc.t-: +,lcmp. What is4 j.en-u x sh.xth18r;t rhs/o represented by the letsh rn 4t.ro/xh-et81 s .j;uhxters?

A. The X is Anaerobic respiration by Archaeans Y is Photosynthesis by producers Z is Incomplete decomposition of organic matter
B. The X is Cell respiration by autotrophs Y is Cell respiration by saprotrophs Z is Cell respiration by saprotrophs
C. The X is Anaerobic respiration by Archaeans Y is Cell respiration by autotrophs Z is Incomplete decomposition of organic matter
D. The X is Cell respiration by autotrophs Y is Photosynthesis by producers Z is Cell respiration by saprotrophs


参考答案:  C


本题详细解析:
The letter “X” in the diagrbdkixji7490qt x) nz23lha2q am represents the process through which methane is released from peat. Peat forms in acidic and/or anaerobic conditions in marshes and other waterlogged areas. Methanogenic Archaeans present in peat use anaerobic respiration to decompose organic compounds releasing methane to the atmosphere. So, the process represented by the letter X is anaerobic respiration by Archaeans. The letter “Y” in the diagram represents the process through which carbon dioxide is released to the atmosphere by marsh plants. Plants are autotrophs, meaning they are organisms that produce their own food (sugar and other carbon-based molecules) from inorganic carbon. Plants break down some of the sugar they produce through aerobibqa4xh0)k27tj93xz ndl2 iiq c cellular respiration which releases carbon dioxide as a byproduct. So, the process represented by the letter Y is cell respiration by autotrophs. The letter “Z” in the diagram represents the formation of peat from organic carbon litter. Peat forms when organic material is not fully decomposed in acidic and/or anaerobic wetlands. So, the process represented by the letter Z is the incomplete decomposition of organic matter.

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