STD 11 - 10. Cell cycle and cell division — BIOLOGY STD 11 Science — 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?