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Answer:
a. It can be used for photosynthesis.
Explanation:
Since carbon dioxide is needed in the photosynthesis process, then much of the carbon dioxide which is produced by green plants is not always excreted in form of metabolic waste because it can be easily used in the photosynthesis process.
Unsaturated fats<span> are typically liquid at room temperature. They differ from </span>saturated fats<span> in that their chemical structure contains one or more double bonds.</span>