What is living? · NCERT Biology

Which of the following is the correct sequence of levels of biological organization?

  1. Atoms → Molecules → Cells → Tissues → Organs → Organ systems → Organism
  2. Cells → Atoms → Molecules → Tissues → Organs → Organism
  3. Molecules → Atoms → Cells → Tissues → Organism
  4. Atoms → Cells → Molecules → Tissues → Organ system
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Correct answer: Atoms → Molecules → Cells → Tissues → Organs → Organ systems → Organism

The hierarchy of life starts from atoms, which form molecules, which then organize into cells (the first living level), followed by tissues, organs, systems, and finally the complete organism.

Difficulty: Medium Question 19 of 38

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