Across
- 5. any process that uses bacteria, fungi, green plants or their enzymes to return the environment altered by contaminants to its original condition
- 6. asexual reproduction by a separation of the body into two new bodies
- 9. a virus that attacks the body's immune system (HIV)
- 12. a chemical reaction in which one reactant breaks down into two or more products
- 14. a group of micro-organisms that are similar to, but evolutionarily distinct from bacteria
- 16. a small circular DNA molecule found in bacteria and some other microscopic organisms
- 17. bacteria that can survive and grow where there is no oxygen
- 20. single-celled organisms belonging to the domains Bacteria and Archaea
- 21. A type of immunity that develops when a person's immune system responds to a foreign substance or microorganism, or that occurs after a person receives antibodies from another source
- 22. When a virus is present in the body but exists in a resting (latent) state without producing more virus
- 23. A vaccine in which a live virus is weakened through chemical or physical processes in order to produce an immune response
Down
- 1. medicines that fight infections caused by bacteria in humans and animals by either killing the bacteria or making it difficult for the bacteria to grow and multiply
- 2. a dormant, tough, and non-reproductive structure produced by certain bacteria
- 3. the process by which one bacterium transfers genetic material to another through direct contact
- 4. when a person is given antibodies to a disease rather than producing them through his or her own immune system
- 7. an organism causing disease to its host
- 8. an infectious microbe consisting of a segment of nucleic acid (either DNA or RNA) surrounded by a protein coat
- 10. a hair-like appendage found on the surface of many bacteria and archaea
- 11. microscopic living organisms that have only one cell
- 13. prokaryotic microorganisms that are capable of transforming nitrogen gas from the atmosphere into “fixed nitrogen” compounds, such as ammonia, that are usable by plants
- 14. a protein produced by the body's immune system when it detects harmful substances, called antigens
- 15. microscopic hair-like structures involved in the locomotion of a cell
- 18. a small, soluble case of gelatin containing a dose of medicine
- 19. the process of heating, and then rapidly cooling, liquids or food in order to kill microbes that may expedite their spoilage or cause disease
- 21. bacteria that can grow and live when oxygen is present