The Endoplasmic Reticulum is a network of interconnecting membrane enclosing channels that are continuous from outer outer nuclear envelope to plasma membrane. ER is classified into rough and smooth varieties.
The ER is very prominent in the cell activity synthesizing proteins e.g glycoproteins, lipoproteins and immunoglobins
Archaebacteria are called ancient bacteria whereas eubacteria are called true bacteria. Unlike eubacteria, archaebacteria can survive in extreme conditions.
