Q.

The basic structural and functional unit of living organisms is -

A. Cell
B. Tissue
C. Organ
D. Systems
Answer» A. Cell
Explanation: Robert Hooke (1665) observed a section of cork under his microscope and found its structure resembling a 'honey comb'. He gave the name 'cell' to each of the compartments of the honey comb like structure. Two German biologists, M Schleiden and T Schwann, proposed the famous cell theory in 1938-39.
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