Hierarchical Organisation & Epithelial Tissues — NEET Biology
📚 Practice ConceptCells, tissues, organs and organ systems split up the work in a way that ensures the survival of the body as a whole and exhibit division of labour. Different tissues combine to form organs. Organs work together by performing one or more functions in the body. Epithelial are sheet like tissues lining the body surface and its cavities, ducts and tubes. Epithelia have one free surface facing a body fluid or the outside environment. Their cells are structurally and functionally connected at junctions.
Which of the following statements accurately describe the concept of 'division of labour' in complex multicellular animals? S1: Division of labour in complex animals primarily occurs at the cellular level, where individual cells perform all basic life functions independently. S2: The process of division of labour ensures that different groups of cells, tissues, organs, and organ systems specialize in distinct roles. S3: In complex animals, a well-organised manner of function execution by different cell groups contributes to overall body survival through division of labour. S4: Unicellular organisms exhibit a sophisticated level of division of labour, involving specialized tissues and organs for various functions. S5: The coordinated activities resulting from division of labour are fundamental to the efficiency and survival of the body as a whole in multicellular organisms.
View solution & NCERT explanation
Correct answer: B — S2, S3 and S5 only
The question asks to identify accurate statements describing 'division of labour' in complex multicellular animals. S1: In complex animals, division of labour means *different* cells perform different roles, not individual cells performing all functions independently. That's more characteristic of unicellular organisms within one cell. Division of labour in complex animals spans cells, tissues, organs, and organ systems. So, this statement is incorrect. S2: The NCERT states, 'Cells, tissues, organs and organ systems split up the work in a way that exhibits division of labour'. This statement is correct as it describes the specialisation at different structural levels. S3: 'In the complex body of multicellular animals the same basic functions are carried out by different groups of cells in a well organised manner...Cells, tissues, organs and organ systems split up the work in a way that exhibits division of labour and contribute to the survival of the body as a whole.' This statement is correct. S4: In unicellular organisms, 'all functions... are performed by a single cell', not specialized tissues and organs. Division of labour in this context refers to specialization within the single cell, not among tissues/organs. So, this statement is incorrect. S5: The NCERT concludes that division of labour 'contribute to the survival of the body as a whole'. This statement is correct. Therefore, the correct statements are S2, S3, and S5.
What does NCERT say about Cells tissues organs and?
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Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.