Unicellular organisms are capable of (i) independent existence and (ii) performing the essential functions of life. Anything less than a complete structure of a cell does not ensure independent living. Hence, cell is the fundamental structural and functional unit of all living organisms.
Which of the following statements is correct regarding the cell?
Correct answer: D — Cell is the fundamental structural and functional unit of all living organisms.
Option (a) Incorrect: Antonie Von Leeuwenhoek first saw and described a live cell, not Robert Brown. Option (b) Incorrect: Robert Brown discovered the nucleus, not Leeuwenhoek. Option (c) Incorrect: Anything less than a complete structure of a cell cannot ensure independent living. Option (d) Correct: NCERT states clearly that the cell is the fundamental structural and functional unit of all living organisms.
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