Today, cells are classified in two groups according to whether they contain membrane - bound

Today, cells are classified in two groups according to whether they contain membrane-bound organelles.

Explanation:

The classification of cell was made as eukaryotes and prokaryotes in and more specifically by the presence or absence o membrane bound organelles. The prokaryotic cell lacks the presence of these membrane-bound structures, but eukaryotes do contain these organelles. The common examples of non-membrane bound organelles are ribosomes, the cell wall, and the cytoskeleton. Mitochondria, golgi body, nucleus, endoplasmic reticulum etc. are the examples containing membrane bound structures.