What are basal bodies ?

Basal body is the structure found at the base of eukaryotic cilia and flagella. It is formed by the centrioles.
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what is the major function of cilia and flagella.


The major function of cilia and flagella is to help in the locomotion and movemnet of the cells. Cilia are shorter and acts like oars causing the movement of the cell or the surrounding medium around it. Flagella are longer as compared to cilia and are responsible for the movement of the cell.

 

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Describe the structure of centriole.

The centriole is composed of nine evenly spaced perpheral fibrils of tubulin protein. Each fibril is a triplet.  These triplets are arranged in a circle around a central hub that is proteineceous in nature.The hub is connected to the tubules by radial spokes made of protein. 

 

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Describe the functions of centrioles.

Functions of centrioles :

1. They form the basal body of cilia and flagella. 

2. The form spindle fibres during the cell division which helps the chromosomes to divide equally.

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What are plastids ? Name their types.

Plastids are organelles that have specific pigments which impart colours to the organism. They are found in plants and euglenoids. 
On the basis of pigment contained they can be divided into three types that are :
i. Chloroplasts
ii. Chromoplasts
iii. Leucoplasts.
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