Shell of which one of the following is composed of interlocking cellulose plates

Explanation

The correct answer is Dinoflagellates. These protists have a unique cell covering made of interlocking cellulose plates, known as theca, which provide structural support and protection. In contrast, diatoms have silica-based cell walls, kelps are brown algae with cellulose and alginates, and red algae have cell walls composed of cellulose and other polysaccharides. Understanding the specific structural characteristics of these groups helps in distinguishing them.