Question

Centrioles are present only in animal cell then how spindle fibres are arising in plant cell?

Answer 1

Explanation:

When animal cells undergo mitosis they are considered by some to benefit from the presence of centrioles which appear to control spindle fibre formation and which later has an effect on chromosome separation. Research however has shown that mitosis can take place in animal cells after centrioles have been destroyed. Sometimes this seems to be at the expense of abnormalities in spindle development and subsequent problems with chromosome separation. Recent research also suggests that embryos of Drosophila arrest very early if centriole replication cannot take place.

In higher plants mitosis takes place perfectly satisfactorily with microtubules forming spindle fibres but without the help of centrioles. The function of centrioles therefore remains something of a mystery.