Peptidoglycan is the material found in the bacterial that forms a molecular basis of the Gram stain.

Gram positive. and gram negative

Explanation:

both are formed

Gram positive and Gram negative

Explanation:

Bacteria are classified as gram positive or negative depending on whether or not they take up gram stain. The bacteria cell wall is unusual in its chemical construction .It has a strong layer of sugar polymer, cross-linked by amino acid and called *PEPTIDOGLYCAN*.

The bacteria cell wall that has a much of peptidoglycan stains *blue, and termed Gram positive*,while the *gram negative have less peptidoglycan and stained pink to red*. Example of Gram positive bacteria are Clostridium tetani, wound infecting Staphylococcus aureus(spherical),Tuberculosis-causing actinomycetes -Mycobacterium tuberculosis. Examples of Gram negative bacteria are Syphilis causing Treponema pallidum(spiral),Escherichia coli(rod), gonorrhea causing Neisseria gonorrhoeae(spherical),and Cyanobacteria.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs