Answer:
Mucoid capsule
Step-by-step explanation:
A mucoid capsule imparts slippery outer surface to the bacterial cells. The slippery mucoid capsule does not allow the phagocytic cells of the host organisms to contact the bacterium and thereby prevents phagocytosis.
Some of the pathogenic bacteria that evade phagocytosis by the production of the mucoid capsule are Streptococcus pneumoniae, Neisseria meningitides, etc.