Bacteria can be classified into two groups - Gram positive and Gram negative on the basis of :

Question

( a ) the manner in which they respond to the staining procedure
( b ) the differences in the cell envelopes and the manner in which they respond to the staining procedure developed by Gram
( c ) the differences in the cell envelopes and the manner in which they respond to the staining procedure
( d ) the differences in the cell envelopes