differentiate between centriole,centromere and centrosome.

A centriole is an organelle inside a cell. Usually only animal cells have centrioles. Each cell has two pairs of centrioles. Each 'pair' of centriole is called a centrosome arranged at right angles to each other. Centrioles are responsible for organizing something called a 'spindle' during cell division.

A centromere is a region in a chromosome. Each chromosome has two 'chromatids' joined together at the centromere.