Understanding the Term Protoplasm

The question asks about the scientist who first introduced the term 'protoplasm'. Protoplasm is a fundamental term in biology, referring to the living substance inside a cell, including the cytoplasm and nucleus.

Identifying Who Coined Protoplasm

Let's look at the contributions of the scientists mentioned in the options to understand who coined the term protoplasm:

• Robert Brown: Known for discovering the nucleus in plant cells in 1831.
• Robert Hooke: Famous for observing the cell (specifically, cell walls in cork) for the first time in 1665 and coining the term 'cell'.
• Rudolf Virchow: A key figure in the development of cell theory. He extended Schleiden and Schwann's work and is known for the aphorism "Omnis cellula e cellula," meaning "all cells arise from pre-existing cells," proposed in 1855.
• Purkinji: Johannes Evangelista Purkinje was a Czech anatomist and physiologist. He is credited with coining the term 'protoplasm' in 1839 to describe the jelly-like substance within animal embryos. Later, Hugo von Mohl (in 1846) used the term 'protoplasma' for the contents of plant cells, establishing the broader meaning of protoplasm as the living content of any cell. However, Purkinji was the first to coin the term.

Based on the historical contributions, Purkinji is the scientist credited with coining the term protoplasm.

Therefore, the scientist who coined the term protoplasm is Purkinji.