What produces the spindle fibres in plant cells since there are no centrioles and centrosomes?

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Solution

Centrosome is not absent in plant cells. Plant cells have centrosomes instead of centriole and play the similar roles in cell division i.e formation of spindle fibres as what centrioles play in cell division of animal cells. But centrosomes have relatively simpler organisation than centriole in animal cells.

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Q. Sir
How does mitosis occur in plants without centrioles and centrosomes. We are taught that spindle fibres are formed by centrioles moving to opposite poles of the cell and plant cells don't posses centrioles. Then how is the spindle apparatus is formed and constricted to divide the chromatids.

As spindle fibres are formed by centrioles during mitosis. But they are absent in plant cells. So who forms spindle fibres in plants in order to carry out mitosis.

-Uby. H

How does plant chromosomes gets separated without centriole? How spindle fibres are made in plant cell?

Q. Choose the correct options from the following:
A. Centrioles are made up of nine evenly spaced peripheral fibrils of tubulin.
B. The centrioles in a centrosome lie parallel to each other.
C. The central part of the centriole is also proteinaceous and called the hub.
D. Centrioles form the spindle fibres that give rise to spindle apparatus during cell division.

Q. Centrosome includes a pair of centrioles that help in cell division by spindle formation. The non-dividing cells in human are

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