Years before Schwann's pronouncement that a cell has a life of its own even as a component of a multicellular organism, the cell nucleus had been discovered by
A)Robert Hooke.
B)Robert Brown.
C)Theodor Schwann.
D)Rudolf Virchow.
E)Anton van Leeuwenhoek.

Question

Quizplus · Accepted Answer

The cell nucleus was discovered by Robert Brown in 1831, before Schwann's pronouncement in 1839. Hooke, Leeuwenhoek, and Virchow all made important contributions to the development of cell theory, but they did not discover the cell nucleus. Schwann's famous statement that a cell has a life of its own even as a component of a multicellular organism referred to the cell membrane and internal structures, not specifically to the nucleus.

Years Before Schwann's Pronouncement That a Cell Has a Life