Kelas utama
2X
Divisi
Seksi
- 570Life sciences; biology
- 571Physiology & related subjects1
- 572Biochemistry1
- 573Specific physiological systems in animals
- 574[Unassigned]
- 575Specific parts of & systems in plants1
- 576Genetics & evolution
- 577Ecology1
- 578Natural history of organisms
- 579Microorganisms, fungi & algae