How is a gram-positive cell envelope (cell wall) different than a gram-negative cell envelope

Explanation:

                Gram Positive                                           Gram Negative

(primary stain) and appear in purple

under microscope.                                  Does not retain the crystal violet  

                                                                      stain, appear as pink with safranin

                                                                           (counter stain)

2. The cell wall primarily composed

of peptidoglycan                                          Cell wall contain three main    

                                                                 components – (1) Lipopolysaccharides,

                                                                   (2) Lipoproteins and (3)Peptidoglycan

3. Thick and

homogenous cell wall.                                 Thin and heterogeneous cell wall.

4. Less lipid content                                    Comparatively more lipid content

5.Teichoic acid present                        Teichoic acid absent

6. LPS absent                                                                   LPS present

the fossil record provides evidence of a common ancestor to many species.