A. $X$ is Anaerobic respiration by Archaeans ; $Y$ is Photosynthesis by producers ; $Z$ is Incomplete decomposition of organic matter
B. $X$ is Cell respiration by autotrophs ; $Y$ is Cell respiration by saprotrophs ; $Z$ is Cell respiration by saprotrophs
C. $X$ is Anaerobic respiration by Archaeans ; $Y$ is Cell respiration by saprotrophs ; $Z$ is Incomplete decomposition of organic matter
D. $X$ 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:
Explanation:
The letter “X” in the diagram 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 aerobic cellular respiration which releases carbon dioxide as a byproduct. So, the process represented by the letter Y is cell respiration by autotrophs
