Let's analyze the given information and the common knowledge about bacterial forms, shapes, and associated diseases:
1. Coccus: The term "coccus" refers to spherical-shaped bacteria. An example of a disease caused by coccus-shaped bacteria is strep throat, which is caused by Streptococcus bacteria.
2. Bacillus: Bacillus refers to rod-shaped bacteria. Diseases commonly associated with rod-shaped bacteria include infections caused by Escherichia coli (E. coli).
Given this information, we can match the shapes and associated diseases:
- [tex]$X$[/tex] should describe the shape of coccus bacteria, which is spherical.
- [tex]$Y$[/tex] should describe a disease associated with bacillus (rod-shaped) bacteria, an example of which is E. coli.
Thus, the best description for [tex]$X$[/tex] and [tex]$Y$[/tex] is:
- [tex]$X=$[/tex] Spherical
- [tex]$Y=$[/tex] E. coli
So the correct option is:
[tex]$X=$[/tex] Spherical; [tex]$Y=$[/tex] E. coli
