Across
- 2. chemicals produced by microorganisms that kill or int growth of other harmful microorganisms
- 3. a suspension of killed, or weakened, microorganisms administered to increase protection against a disease ie to bolster immunity
- 7. it is the process of conversion of dead plant material into coal
- 8. fuels formed from dead plant and animal matter buried deep under the surface of earth over a period of millions of years
Down
- 1. the tendency of an element to react with other substances to form compounds
- 4. a homogenous mixture of two or more metals, or a metal and a non metal
- 5. thread-like structures found in the nucleus responsible for the inheritance of characters
- 6. sac-like membrane bound structures in cells used for storing various materials