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Biology · BIOLOGICAL CLASSIFICATION

हिन्दी

Diatoms are chief 'producers' in the oceans. What structural composition renders their cell wall indestructible, giving rise to 'diatomaceous earth'?

  1. Deposition of chitin and calcium carbonate
  2. Silica embedded in walls forming two thin overlapping shells that fit like a soap box
  3. Protein pellicle reinforced with peptidoglycan layers
  4. Thick mucilaginous sheath containing sporopollenin

Correct answer · Option 2

Silica embedded in walls forming two thin overlapping shells that fit like a soap box

Explanation

Diatom cell walls are embedded with silica and fit together like a soap box, making them indestructible and accumulating over billions of years as diatomaceous earth.
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