To determine the values of [tex]$X$[/tex] and [tex]$Y$[/tex], let's analyze the table and the characteristics of the bacteria mentioned:
1. Coccus bacteria:
- In microbiology, coccus refers to bacteria that are spherical in shape.
- Therefore, [tex]$X$[/tex] represents the shape of coccus bacteria.
2. Bacillus bacteria:
- Bacillus bacteria are rod-shaped.
- The associated disease for Bacillus is pneumonia.
Given these explanations:
- For coccus bacteria, the best description for [tex]$X$[/tex] would be "Spherical".
- For bacillus bacteria, the best description for [tex]$Y$[/tex] would be "Pneumonia".
Now let's match these with the given options:
1. [tex]$X=$[/tex] Spherical; [tex]$Y=$[/tex] E. coli
2. [tex]$X=$[/tex] Comma shaped; [tex]$Y=$[/tex] Whooping cough
3. [tex]$X=$[/tex] Oval shaped; [tex]$Y=$[/tex] S. aureus
4. [tex]$X=$[/tex] Rod shaped; [tex]$Y=$[/tex] Pneumonia
Based on our analysis:
- Option 1 correctly identifies [tex]$X$[/tex] as Spherical, but incorrectly associates [tex]$Y$[/tex] with E. coli.
- Option 2 incorrectly identifies [tex]$X$[/tex] as Comma shaped and associates [tex]$Y$[/tex] with Whooping cough.
- Option 3 incorrectly identifies [tex]$X$[/tex] as Oval shaped and associates [tex]$Y$[/tex] with S. aureus.
- Option 4 incorrectly identifies [tex]$X$[/tex] as Rod shaped but correctly identifies [tex]$Y$[/tex] as Pneumonia.
Thus, the correct answer is:
[tex]$X=$[/tex] Spherical; [tex]$Y=$[/tex] Pneumonia
