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23 August 2026

Narwhal tusk structure

The topic provides scientific context on biomimicry and structural engineering that can be used as an illustrative example in questions related to biotechnology or material science, though it is not a direct exam topic.

1 min read 1 questions 1 prelims

Notes

  • The narwhal tusk is identified as nature's only straight tusk.
  • The tusk's structural integrity and straight growth are attributed to a unique double-twist mechanism.
  • Microscopic collagen fibrils form the building blocks of the tusk.
  • X-ray imaging reveals two distinct layers: an outer layer with a left-handed twist and an inner layer with a right-handed twist.
  • The opposing twists generate internal tension, which provides the tusk with its mechanical strength and straight orientation.
  • Understanding these biological patterns provides insights into how tissues integrate structures to achieve specific mechanical properties.

Questions

  1. The study of biological structures like the narwhal tusk offers significant insights into biomimetic engineering. Discuss how understanding the mechanical properties of natural tissues can contribute to advancements in material science and structural design. 150 words
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Prelims

  1. With reference to the structural composition of the narwhal tusk, consider the following statements: 1. The tusk gains its straightness from a double-twist mechanism of collagen fibrils. 2. The outer layer of the tusk twists to the right while the inner layer twists to the left. Which of the statements given above is/are correct?

Syllabus

Topics

Sources

250words.in · https://250words.in/daily/2026-08-23/narwhal-tusk-structure