Which structure is present in animal cells but absent in plant cells?

The number of membranes that surround the centriole structure is:

The centrosome is involved in:

How many triplets are present in the structure of a centriole,and what is the angle between them?

The principal protein of cilia and flagella is

Statement $X$ : Basal bodies are involved in the formation of cilia and flagella.
Statement $Y$ : Nucleoli contain the nucleus and chromatin material.