Structural organisation in animals attains different levels as cell - organ
- organ system. What is missing in this chain? Mention the significance
of such an organisation.
NCERT Class XI
Biology - Exemplar Problems
Chapter 7. Structural Organisation in Animals
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The correct answer will be:
Cell - tissue - organ - organ system.
Cell - tissue - organ - organ system.
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Cell - tissue - organ - organ system.
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