What is Phylum Gram-Positive?

Answer 1

Bacteria are those that are stained dark blue or violet by Gram Staining.

Answer 2

Gram-positive is a classification of bacteria based on their cell wall structure. Bacteria in the phylum Firmicutes are typically Gram-positive, meaning they retain the crystal violet stain in the Gram staining technique. Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, which gives them their characteristic staining property and contributes to their resilience.