Cell The Unit of Life — BIOLOGY STD 11 Science — Question

Centrosome is an organelle usually containing two cylindrical structures called centrioles. They are surrounded by amorphous pericentriolar materials both the centriole in centrosome lie perpendicular to each other in which each has an organization like that of an 'cartwheel'. A centriole possesses a whorl of. 9. peripheral fibrils. There fibrils are absent in the centre, hence the arrangement is called 9 + 0. Each fibril is made of 3 sub-fibres. Therefore, called triplet fibril. The centrioles form the basal body of cilia and flagella. It also forms spindle fibres that gives rise to spindle apparatus during cell division in animals.