How many microtubule triplets are arranged in the peripheral area of a centriole?

The number of membranes that surround the centriole structure is:

The function of the centrosome is:

Study the following statements on cilium or flagellum and answer the question.
$(i)$ Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.
$(ii)$ Cilia are smaller which work like oars,causing the movement of either the cells or surrounding fluid.
$(iii)$ Flagella are comparatively longer and responsible for cell movement.
$(iv)$ Cilium and flagellum are covered with plasma membrane. Which of the above statements are correct?

The basal body of cilia and flagella is formed by .............

The central part of the centriole is made up of: