Across
- 2. endorsed authoritativelyas having met certain standards
- 3. a substance (as an element or compound) obtained from a chemical process or used to get a chemical result
- 7. the state of wearing away by or as if by the action of water, wind, or glacial ice
- 8. chemicals used to kill bacteria; may also be used as a growth stimulant in livestock
- 10. small cages used to hold several hens for long periods of time
- 11. a careful preservation and protection of something; especially planned management of a natural resource to prevent exploitation, pollution, destruction, or neglect
- 13. biological variety in an environment as indicated by numbers of different species of plants and animals
- 14. made, produced, or performed by human beings
- 16. chemicals that kill insects
- 17. introducing dna from other species in order to get new characteristics such as vitamin production, disease resistance, etc.
- 18. usually small plastic pieces with embedded hormones that are inserted under an animal’s skin for slow-release of the chemicals
- 19. large pens of livestock kept confined and usually fed grain until large enough to harvest
Down
- 1. chemicals that kill plants
- 4. insects that perform valued services like pollination and pest control
- 5. following,agreeing with, or based on a way of doing things that is widely accepted and followed
- 6. to soil, stain, or infect by contact or association
- 9. a substance used to make soil produce larger or more plant life
- 12. chemicals made in one part of the body that act on another part of the body;part of the body’s chemical message system; used to make livestock grow faster or produce more milk
- 15. an individual grown from a single body cell of its parent and having the same genes as its parent
