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compounds such as lipids, carbohydrates, proteins, nucleic acids, vitamins, petrochemicals and some plastics that contain the elements carbon and hydrogen.
biological classification group (taxon) for animals that is divided into classes. The plural of...
non-indigenous species which reproduce and spread more rapidly than indigenous species. This...
a group or category in the biological classification system (the plural of taxon is taxa).
a large tongue-shaped organ in the mammalian body which secretes hormones and digestive enzymes...