Select ALL correct statements about centrioles.

(1) They are found only in animal cells

(2) They occur in pairs

(3) They are composed of nine sets of microtubule triplets

(4) They form asters during early spindle formation

(5) They replicate during telophase so each daughter cell has its own

Explanation

Key facts about centrioles:

• Found only in animal cells - not in most higher plant cells
• Occur in pairs, located near the nucleus during interphase
• Composed of nine sets of microtubule triplets in a cylindrical arrangement
• Form asters during early mitotic spindle assembly
• Replicate during telophase so that each daughter cell receives its own pair

Most higher plants do not have centrioles - they still form spindle fibers, but without centrioles or asters.