Question 24 Match the description to the infectious agent. Column A 1. tiny, single-celled organisms with no nucleus inside the digestive track: tiny, single-celled organisms with no nucleus inside the digestive track 2. no cells, takes over a host cell from which it replicates and spreads into neighboring host cells: no cells, takes over a host cell from which it replicates and spreads into neighboring host cells 3. multicellular organisms made up of cells that have cell walls and well-defined nuclei: multicellular organisms made up of cells that have cell walls and well-defined nuclei 4. an organism that lives in or on another organism and takes nutrients at the expense of the host.: an organism that lives in or on another organism and takes nutrients at the expense of the host. Column B a.parasite b.viruses c.fungi d.bacteria

Answer 1

Here are the matches between the descriptions in Column A and the infectious agents in Column B:

1. tiny, single-celled organisms with no nucleus inside the digestive track: d. bacteria
2. no cells, takes over a host cell from which it replicates and spreads into neighboring host cells: b. viruses
3. multicellular organisms made up of cells that have cell walls and well-defined nuclei: c. fungi
4. an organism that lives in or on another organism and takes nutrients at the expense of the host: a. parasite

So the matched pairs are: 1 - d, 2 - b, 3 - c, 4 - a.