Some bacteria secrete a nonprotein material to cover their antigen. This allows it to go unnoticed by the immune system. That coating is called ___. the capsid the spore cilia the capsule

Introduction Bacteria Are Single-celled Organisms That Do Not Belong To Either The Plant Or Animal Kingdoms.They Are Normally Only A Few Μm Long And Live In Groups Of Millions. In Most Cases, A Gramme Of Soil Contains Around 40 Million Bacterial Cells. A Million Bacterial Cells Can Be Found In A Millilitre Of Fresh Water. Bacteria Are Expected To Make Up A Large Portion Of The Earth's Biomass, With An Estimated 5 Billion Bacteria On The Planet. Bacteria Come In A Variety Of Shapes And Sizes. Shape Is One Way To Categorise Them. There Are Three Primary Shapes To Be Aware Of. Spherical Shape : Cocci Are Bacteria That Are Formed Like A Ball, And A Coccus Is A Single Bacterium. The Streptococcus Group, Which Causes "strep Throat," Is An Example. Rod Shaped : Bacilli Are Rod-shaped Organisms (singular Bacillus). Some Bacteria Have A Curved Form. These Are Referred To As Vibrio. Bacillus Anthracis (B. Anthracis), Sometimes Known As Anthrax, Is An Example Of A Rod-shaped Bacteria. Spiral Shaped : Spirilla Is The Name Given To These Spirals (singular Spirillus). Spirochetes Are Organisms That Have A Very Tight Coil. Bacteria Of This Form Cause Leptospirosis, Lyme Disease, And Syphilis.Answer : Correct Option Is A CAPSULE. Many Bacteria Have A Large Structure Called A Bacterial Capsule. It Is A Polysaccharide Layer That Resides Outside The Cell Envelope And Protects The Cell's Antigens, And Hence Is Considered Part Of The Bacterial Cell's Outer Envelope. It's A Well-organized Coating That's Difficult To Remove And Can Cause A Variety Of Infections.Option Capsid Is Incorrect Because The Capsid Encases The Virus And Is Made Up Of A Finite Number Of Protein Subunits Called Capsomeres, Which Are Usually Located Around Or Associated With The Virion Nucleic Acid. Option Spore Is Incorrect Because A Spore Is A Type Of Cell Produced By Fungus, Plants And Bacteria. Spores Play An Important Role In Reproduction. Option Cilia Is Incorrect Because Cilia Are Only Found In Eukaryotic Cells And Are Not Found In Bacteria. With The Help Of Cilia, Only Eukaryotic Cells May Move. Hence, Options Capsid, Spore And Cilia Are Incorrect.