alleryThe CORRECT hierarchy in multicellular organisation is:
ACells → Tissues → Organs → Organ systems
BTissues → Cells → Organs → Organ systems
COrgans → Tissues → Cells → Organ systems
DOrgan systems → Organs → Cells → Tissues
Answer & Solution
Correct answer: A. Cells → Tissues → Organs → Organ systems
The hierarchy is: cells (basic units)
→ tissues (similar cells)
→ organs (different tissues, one function: heart, leaf, kidney)
→ organ systems (multiple organs, one big task: digestive, respiratory, nervous).
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