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NEET • Biology

Cells: The Unit of Life

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fact

Cell Definition and Early Discoveries

A cell is the fundamental, structural and functional unit of all living organisms.

Recall Question

Who first observed and described a live cell?

Reveal Answer

Anton Von Leeuwenhoek.

NEET Trap

  • Robert Hooke discovered cell; Leeuwenhoek observed live cell.

ScientistSource-backed contribution

Robert Hooke

Discovered cell.

Anton Von Leeuwenhoek

First observed and described a live cell.

Matthias Schleiden (1838)

Observed that all plants are composed of different kinds of cells.

Theodore Schwann (1839)

Found plasma membrane and plant cell wall; proposed that animals and plants are composed of cells and products of cells.

Rudolf Virchow (1855)

Explained cells divide and new cells form from pre-existing cells; modified cell theory.