Question

The absence of centrioles from higher plant cells means that during somatic cell nuclear division there is?
A) No apparent organizer of mitosis spindles
B) No equatorial arrangement of chromosomes at metaphase
C) No new cell wall laid down at telophase
D) No spindle formed

Answer 1

Centriole is a cylindrical cell organelle which is mainly composed of tubulin protein. Centrioles are found in eukaryotic cells. The main function of the centriole is in cytokinesis (division of cell into two daughter cells).

Complete answer:

Centrioles play a major role in the organization of the mitotic spindle and in the completion of cytokinesis.
They are the important parts of the centrosomes, which are involved in organizing microtubules in the cytoplasm.
The position of centriole determines the position of nucleus and plays an important role in the spatial arrangement of the cell.
Centrioles aid in cell division by facilitating the separation of chromosomes.
For this reason, the centrioles are located near the nucleus in the cell.
Centrioles are also involved in the formation of cilia and flagella and thus they contribute in the cell movement.
They are the paired barrel shaped cell organelles.
Therefore, it has been clear from the above discussion that the absence of centrioles from higher plants cells means that during somatic cell nuclear division there is no apparent organizer of mitotic spindles.

Hence, option A is the correct answer.

Note: A centriole is a set of microtubules that are arranged in a specific way. There are nine groups of the ,microtubules that are arranged in the form of a ring. When two centrioles are found next to each other, they are at the right angle to each other. Centrioles move towards the poles when there is a time for cell division.