Chapter 9 Key Terms

4. Microscopic, submicroscopic infectious agent that replicates only inside the living cells of an organism, as it cannot reproduce on its own.
7. Involving interaction between two different organisms living in close physical association.
9. A single-celled microscopic animal of a group of phyla of the kingdom Protista.
10. the long, thread-like filaments that serve as the basic structural unit of most fungi.
11. A form of vegetative asexual reproduction where a mature, often filamentous, thallus breaks into two or more fragments.
12. The kingdom that consists of eukaryotic, heterotrophic organisms, including mushrooms, molds, and yeasts, that are distinct from plants, animals, and bacteria.
13. A diverse group of photosynthetic, chlorophyll-containing organisms, ranging from single-celled to large seaweeds, that live primarily in aquatic habitats.
14. a composite organism formed by a symbiotic partnership between a fungus and a cyanobacteria.

1. A parent cell splits into two identical daughter cells.
2. The kingdom that contains the true bacteria.
3. A diverse, mostly unicellular kingdom made up of eukaryotic organisms that do not fit into the kingdoms of animals, plants, or fungi.
5. Microscopic, single-celled organisms that thrive in diverse environments, including soil, water, and living hosts.
6. The kingdom whose members live in extreme conditions.
8. The process by which one bacterium transfers genetic material to another through direct physical contact.
9. The small and microscopic organisms drifting or floating in the sea or fresh water.