Across
- 4. the study of birds is called
- 5. cultivation of rice was first introduced in
- 7. technique of producing silk
- 9. evolution is the study of
Down
- 1. career which contemplates to study of life elsewhere in universe
- 2. taxonomy is also called
- 3. example as the study of biochemistry
- 6. treatment and surgery of animals is called
- 8. science which aims to improve human race through controlled heredity.
- 9. animals who lay eggs are called