Which organelle lacks $DNA$ but is capable of duplication?

The function of the centrosome is:

Nerve cells do not divide because they do not have

In the structure of a centriole,the nine peripheral triplets are arranged at what approximate angle (in $^{\circ}$)?

$Cilia$ and $Flagella$ are hair-like outgrowths of the cell membrane. $Cilia$ are small structures which work like oars,causing the movement of either the cell or the surrounding fluid.

Which of the following organisms contains cilia?