Across
- 4. A protein that speeds up chemical reactions(n)
- 6. Too small to be seen without a microscope(adj)
- 7. Derived from living matter(adj)
- 9. Poisonous or harmful(adj)
Down
- 1. To remove unwanted material(v)
- 2. To take in oxygen and release carbon dioxide(v)
- 3. A group of similar cells performing a function(n)
- 5. A living thing (n)
- 6. To change in genetic structure (v)
- 8. The basic unit of life (n)