http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1. How animals and plants protect themselves. -- 2. Reproduction of humans and animals. -- 3. Basic needs of living things. -- 4. The respiratory system. -- 5. Excretion and defecation. -- 6. Living a healthy life. -- 7. How and why plants reproduce. -- 8. The responses to stimuli