When it comes to stability and the absence of atom movement surrounding the bond, <u>peptide bonds</u> behave like double bonds (peptide bonds are unusually stable compared to other types of <u>macromolecules</u>).
Peptide Bond- The -nitrogen atom of one amino acid and the carbonyl carbon of another create a peptide link, also known as an amide bond. As opposed to -amine or -carbonyl, so-called iso-peptide bonds are amide bonds between sidechain amines or carbonyl carbons.
Macromolecules- An extremely big molecule made up of hundreds or thousands of atoms, such as a protein, colloidal particle, or particularly a polymer. For instance Macromolecules include proteins, DNA, RNA, carbohydrates, and lipids.
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The correct option is this: IT HAS PEPTIDOGLYCAN.
Eubacteria are those bacteria that are considered to be real bacteria and they can be found virtually everywhere. They are prokaryotes and thus lack true nucleus. They are normally categorized based on their shapes. One specific characteristic of eubacteria is their possession of cell walls that are made of peptidoglycan, this chemical strengthen their cell wall and enhance their ability to withstand hostile environments. 
 
        
                    
             
        
        
        
Have you finished this?? I need gelp
        
             
        
        
        
I think true if its not sorry
 
        
                    
             
        
        
        
Answer:
Lymphatic: bacteria invade the body but are removed with the help of cells
Endocrine: A chemical message is signaled to help the body relax and sleep
Nervous: The brain signals for the muscles to contract
Explanation:
Lymphatic system is the part in the body that uses the cells in your body to help it.
The endocrine system is about hormones and how the body needs to maintain stable and have homeostasis.
The brain is part of the nervous system and it sends signals to other parts of the body.