Across
- 2. a small amount of a substance
- 6. to bring someone or something back to life
- 8. the disappearance of a group of species
- 9. parts of DNA
- 10. all the different types of animals or plants that exist
- 11. a mixed-breed animal
Down
- 1. the back legs of a four-leged animal
- 3. an animal preying on others
- 4. baby in the very early stage of growth in the womb
- 5. an important and sudden discovery
- 7. an illness