Cell The Unit Of Life Question 89
Question: Schleiden and Schwann proposed:
Options:
A) phenomenon of Brownian movement
B) cell theory or cell doctrine
C) protoplasm as a physical basis of life
D) None of the above
Show Answer
Answer:
Correct Answer: B
Solution:
Cell theory (cell doctrine) was proposed by Matthias Schleiden (1838) and Theodor Schwann (1839). Their original formulation stated that: (1) all living organisms are composed of one or more cells, and (2) the cell is the basic structural and functional unit of life. The principle that “all cells arise from pre-existing cells” (Omnis cellula e cellula) was later added by Rudolf Virchow in 1855.
BETA
