Bacteria

3. - cannot grow in the presence of oxygen.
5. - One of the two cycles of viral reproduction, the other being the lytic cycle.
9. - Depends on aerobic respiration and uses oxygen as a terminal electron acceptor.
11. - A heterotroph is an organism that cannot produce its own food, instead taking nutrition from other sources of organic carbon, mainly plant or animal matter.
13. - One of the two cycles of viral reproduction, the other being the lysogenic cycle.
15. - A microscopic single-celled organism
17. - Surrounds the plasma membrane of plant cells.
18. - Microorganisms that are similar to bacteria in size and simplicity of structure but radically different in molecular organization.
19. - Decomposes organic material.

1. - The injection machinery is responsible for recognizing and puncturing the bacterial host and transferring the viral genome into the host during infection.
2. - A bacterium found mainly in vertebrates' intestines and the soil.
4. - An organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
6. - An organism causing disease to its host.
7. - A protein shell that surrounds and protects the viral genome.
8. - Medicines that fight bacterial infections in people and animals.
10. - Any process that removes, kills, or deactivates all forms of life.
12. - Macromolecule, a polysaccharide, consisting of sugars and amino acids that forms a mesh-like layer outside the plasma membrane.
14. - Found in stagnant water and sometimes causing disease.
16. - A preparation that is used to stimulate the body's immune response against diseases.
20. - A virus that inserts a DNA copy of its RNA genome into the DNA of a host cell that it invades.