Question

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.fungi
c.bacteria
d.viruses

Answer 1

Here are the correct 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 tract: **c. bacteria**
2. no cells, takes over a host cell from which it replicates and spreads into neighboring host cells: **d. viruses**
3. multicellular organisms made up of cells that have cell walls and well-defined nuclei: **b. fungi**
4. an organism that lives in or on another organism and takes nutrients at the expense of the host: **a. parasite**

So the final matches are:
1 - c
2 - d
3 - b
4 - a