(A) The provided figure represents a bacterial cell. $X$ points to the outermost layer of the cell envelope,which is the glycocalyx. $Y$ points to the

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(A) The provided figure represents a bacterial cell. $X$ points to the outermost layer of the cell envelope,which is the glycocalyx. $Y$ points to the pili or fimbriae,which are surface appendages primarily composed of protein subunits (pilin). Therefore,$X$ is glycocalyx and $Y$ is protein.