Dental Which is characteristic of supragingival plaque and not of subgingival plaque in humans? A Motile bacteria are predominant B Spirochetes are evident microscopically C Gram negative bacteria are predominant D Bacterial composition is altered by dietary sugar composition 💡 Explanation Which is characteristic of supragingival plaque and not of subgingival plaque in humans? ✓ Correct Answer: D. Bacterial composition is altered by dietary sugar composition