Which organelle is associated with the formation of the bipolar spindle during cell division?

Which is correct for centriole function in animal cell?
$(I)$ Formation of bipolar spindle
$(II)$ Formation of lysosome
$(III)$ Formation of mesosome
$(IV)$ Formation of ribosome

Explain Centrosome and Centrioles.

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?

Which of the following statements is correct regarding cilia and flagella?

$A$ plant cell usually differs from an animal cell in the absence of