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- Life sciences, biology (60/791)
- Physiology and related subjects (9/246)
- Biochemistry (64/521)
- Specific physiological systems in animals, regional histology and physiology in animals (4/100)
- Specific parts of and physiological systems in plants (2/25)
- Genetics and evolution (11/146)
- Ecology (134/434)
- Natural history of organisms and related subjects (12/283)
- Natural history of specific kinds of organisms (0/2627)
- Economics of land and energy (5/425)
- Other subjects (0/511)