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- Life sciences, biology (57/783)
- Physiology and related subjects (8/240)
- Biochemistry (62/517)
- Specific physiological systems in animals, regional histology and physiology in animals (3/96)
- Specific parts of and physiological systems in plants (2/25)
- Genetics and evolution (11/145)
- Ecology (129/424)
- Natural history of organisms and related subjects (12/282)
- Natural history of specific kinds of organisms (0/2589)
- Economics of land and energy (5/421)
- Other subjects (0/504)