Across
- 3. a non monetary system where production is directed entirely toward basic survival
- 4. the set of chemical and physical processes that sustain life
- 5. modern and ancient humans
- 7. tests the effect of multiple independent variables at the same time
Down
- 1. the increase of brain size relative to body size over evolutionary time
- 2. Energy obtained from external sources
- 6. method for measuring TEE in living subjects