Across
- 4. creature who can live both on land and in water
- 6. part of the earth where organisms live
- 7. art or science of building
- 9. pertaining to the art or skill involved in all kinds of work, science, sports, business, profession, mechanical arts
- 10. one who is skilled in details of an art or subject
- 12. two different organisms living together and depending on each other
- 13. against living forms which invade the body
Down
- 1. expert skill in accomplishing something
- 2. tiny form of life
- 3. fond or devoted to the arts
- 5. a master builder
- 8. removing living tissue from an organism to examine it
- 11. life-like