Chapter 20 & 21
Across
- 5. an organism in which a pathogen lives all or part of its life
- 6. Study of choices people make as they use and distribute limited resources
- 10. curve Shows the relative effects of various doses of a drug or chemical on an organism or organisms as determined by experiments
- 11. An organized attempt to attempt to influence the decisions of lawmakers.
- 12. Impact Statement States the needs for a project, its impact on the environment, and how negative impacts can be minimized
- 13. The amount of a harmful chemical to which a person is exposed to
Down
- 1. Conditions in which human needs are met in such a way that a human population can survive indefinitely.
- 2. Particles in the air that are small enough to breathe into the lungs
- 3. organisms (such as mosquitos) that transmit diseases to people
- 4. Organisms that cause disease
- 7. Study of the spread of diseases
- 8. the study of harmful effects of substances on organisms
- 9. assessment an assessment of the risk posed by an action or substance