Which lipid type is commonly used for waterproofing in plants and animals?

Which lipid type is commonly used for waterproofing in plants and animals?

• A. Triglycerides
• B. Phospholipids
• C. Waxes
• D. Steroids

Answer: (C)

Waxes, as highly hydrophobic long-chain lipids, form a dense, water-repellent coating on surfaces. In plants, the cuticle layer on leaves and stems relies on waxes to minimize water loss, while in animals waxy coatings such as earwax and fur or feather coatings provide a barrier against water. Triglycerides are mainly energy storage fats and aren’t designed to block water. Phospholipids form membranes due to their amphipathic nature, aiding compartmentalization rather than waterproofing. Steroids play roles in signaling and structure, not in creating water barriers. So waxes best explain waterproofing in both plants and animals.

Waxes, as highly hydrophobic long-chain lipids, form a dense, water-repellent coating on surfaces. In plants, the cuticle layer on leaves and stems relies on waxes to minimize water loss, while in animals waxy coatings such as earwax and fur or feather coatings provide a barrier against water. Triglycerides are mainly energy storage fats and aren’t designed to block water. Phospholipids form membranes due to their amphipathic nature, aiding compartmentalization rather than waterproofing. Steroids play roles in signaling and structure, not in creating water barriers. So waxes best explain waterproofing in both plants and animals.