A doctor examines a patient's ear and finds a buildup of cerumen (earwax) that prevents bacterial growth. Chemically, this substance is classified as:
Q1. A doctor examines a patient's ear and finds a buildup of cerumen (earwax) that prevents bacterial growth. Chemically, this substance is classified as:
Answer: Waxes
Explanation: Waxes are protective coatings on skin and ears. Phospholipids are internal membrane components, not external protective barriers like earwax.