Question

consider the table.

types of bacteria

form	shape	associated disease
bacillus	rod shaped	y
spirillum	spiral	cholera

which best describes x and y?

• x = spherical; y = e. coli
• x = comma shaped; y = whooping cough
• x = oval shaped; y = s. aureus
• x = rod shaped; y = pneumonia

Explanation:

1. Analyze the form "Coccus": Bacteria of the coccus form are spherical (or round) in shape. So X (shape of Coccus) should be Spherical.
2. Analyze the form "Bacillus": Bacillus bacteria are rod - shaped. E. coli is a well - known rod - shaped (bacillus) bacterium, and it is associated with various infections. Let's check other options:

• Option 2: Coccus is not comma - shaped (comma - shaped is for some spirillum - related or vibrio bacteria), and whooping cough is caused by Bordetella pertussis (not a typical bacillus - associated disease in the context of this simple table).
• Option 3: Coccus is not oval - shaped (it's spherical), and S. aureus is a coccus (spherical) bacterium, not a bacillus.
• Option 4: Coccus is not rod - shaped (rod - shaped is bacillus), and pneumonia can be caused by various bacteria, but the association with bacillus in this simple table context is not as direct as E. coli for bacillus.

Answer:

A. X = Spherical; Y = E. coli