Final answer:
The specimen used in the C&S refers to a selection of test substances, including plastic, aluminum, pencil sharpener, magnet, wood, chalk, and cloth.
Step-by-step explanation:
In this case, the specimen used in the C&S refers to the selection of test substances mentioned in the given information.
The test substances listed include a piece of plastic, aluminium can, metal pencil sharpener, magnet, wood, chalk, and cloth.
These were likely used to perform various experiments and analyses, such as plant experiments, size exclusion experiments, micro assays, and mass spectrometry, as mentioned in the provided reference.