Infectious Agents

3. Microscopic prokaryotes cells that do not have a nucleus or other membrane-bound organelles. They can live in almost everywhere on earth and in organisms.
4. Viruses can have different shapes, such as the crystal, cylinder, sphere, and ______________________.
7. Centers for Disease Control and prevention
8. Where spores can be found on a mushroom
9. There are three main classes of parasites that can cause disease in humans: protozoa, ____________, and ectoparasites.
11. A strand of DNA or RNA surrounded by a layer of protein that can infect and replicate in a host cell.
13. Fruiting body of fungi.
14. Eukaryotic organisms that have cell walls, are heterotrophs that feed by absorbing their food, and use spores to reproduce.
15. Top of the mushroom

1. An organism that lives on or in a host organism and gets its food from or at the expense of its host.
2. Roots of fungi
5. Cold and _________ season
6. Bacteria can be found in and on ___________________.
7. A virus does not have a cell wall, a nucleus, or any other organelles present in __________.
10. Seeds of the fungi
12. Bacteria come in 3 shapes: rod-shaped, sphere-shaped and ___________-shaped.