Generalized Structure of a Cell Every cell is surrounded by a membrane or a living covering through which it consumes what it requires from the atmosphere and discharges what is superfluous. Within the ... The diagram shows the following structures under an ordinary microscope: (a) Cell wall is found only in plant cells and consists of non-living substances such as lignin, pectin and cellulose. (b) Cellanbsp;...
|Title||:||The Pearson CSAT Manual 2012|
|Publisher||:||Pearson Education India - 2012|