Which of the following organisms contains cilia?

What is the correct description for the internal structure of cilia and flagella?

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

Neurons do not divide because they lack:

$A$: The axoneme of a eukaryotic flagellum possesses a number of microtubules running parallel to the long axis.
$R$: It has a pair of peripheral doublet and a pair of centrally located microtubules.

Identify the incorrect statement regarding the centrosome and centriole.
$(a)$ The centrosome is surrounded by amorphous pericentriolar material.
$(b)$ In the centrosome,both centrioles lie parallel to each other,and both have a cartwheel-like structure.
$(c)$ The centriole is made up of peripheral tubulins from unspecified locations.
$(d)$ The central part of the centriole is a proteinaceous hub.