Which one of the following is not considered as a part of the endomembrane system?

Adult human $RBCs$ are enucleate. Which of the following statement$(s)$ is/are most appropriate explanation for this feature?
$(1)$ They do not need to reproduce.
$(2)$ They are somatic cells.
$(3)$ They do not metabolise.
$(4)$ All their internal space is available for oxygen transport.

The cell organelle that contains an abundance of oxidizing enzymes is .........

The endomembrane system includes ..........

Which of the following statements are correct?
$I$. $PPLO$ is the smallest cell.
$II$. Prokaryotic cells are smaller than eukaryotic cells.
$III$. Cell division in prokaryotic cells is slow.
$IV$. All bacteria show solitary and colonial forms.
$V$. Cell division in prokaryotic cells is very rapid.

Select the correct option for the following matches:

Column-$I$	Column-$II$
$(1)$ Mesosome	$(a)$ Not a component of the endomembrane system
$(2)$ Peroxisome	$(b)$ Many ribosomes associated with a single $m-RNA$
$(3)$ Polysome	$(c)$ Single membrane-bound system
$(4)$ Lysosome	$(d)$ Infoldings of the cell membrane