The function of the centriole is

Which of the following is present in an animal cell?

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

What is a centrosphere?

What is the number of microtubules in a centrosome?

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?