How many total microtubules are present in the structure of a cilium or a flagellum?

The tubules in each triplet of the structure shown in the figure are made of which protein?

Which structure is found in animal cells but is absent in plant cells?

The central part of the centriole is known as:

The arrangement of microtubules in a centriole 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?