Many bacteria are surrounded by a polysaccharide capsule, which both provides the antigens against which antibodies can act, the molecules that largely determine how virulent and pathogenic the organism and protects the main bacterial cell from the bodies defense systems.
helping to improve; promoting further development or advancement (opposed to destructive): constructive criticism. 2. of, relating to, or of the nature of construction; structural. 3. deduced by inference or interpretation; inferential: constructive permission.
Compare destructive interference with constructive interference. constructive interference is a wave with higher crests and deeper troughs & more energy. Destructive interference is when the crests of one wave overlap and have a smaller amplitude.