Most Species of Gram-Positive Bacteria are ____

Question

Most species of Gram-positive bacteria are ____.  
A) photoautotrophic
B) photoheterotrophic
C) chemoautotrophic
D) chemoheterotrophic
E) photochemoautotrophic

Accepted Answer

Gram-positive bacteria are primarily characterized by their thick cell walls that contain peptidoglycan, which is responsible for their ability to retain the crystal violet stain during the Gram staining procedure. Most Gram-positive bacteria are also classified as chemoheterotrophs, meaning that they obtain energy by breaking down organic compounds and obtain their carbon from organic sources.