Final answer:
Peroxisomes self-replicate by growing bigger and then dividing. They carry out oxidation reactions and detoxify poisons in the body.
Step-by-step explanation:
Peroxisomes are small, round organelles enclosed by single membranes. They carry out oxidation reactions that break down fatty acids and amino acids. They also detoxify many poisons that may enter the body. Peroxisomes self-replicate by growing bigger and then dividing. They are commonly found in liver and kidney cells that break down harmful substances.