Question

gram-positive cell walls that are thick and strong are classified as ______. options: gracilicutes, firmicutes, mendosicutes

Explanation:

To solve this, we recall the classification of bacterial cell walls:

• Gracilicutes: Have thin - walled (Gram - negative) cell walls.
• Firmicutes: Have thick, strong (Gram - positive) cell walls.
• Mendosicutes: Have unusual cell walls or lack typical cell walls (not related to thick Gram - positive cell walls).

So, Gram - positive cell walls that are thick and strong are classified as Firmicutes.

Answer:

B. Firmicutes