Question Detail
Question
The cell theory was proposed in: A. 1839 B. 1836 C. 1590 D. 1665
Correct Answer
Option A is the correct answer.
Detailed Explanation
The formal proposal of the Cell Theory, based on the combined work of Matthias Schleiden and Theodor Schwann, is generally dated to 1839. Schwann's book 'Microscopic Investigations on the Accordance in the Structure and Growth of Plants and Animals' was published that year.
Hint
This date falls in the late 1830s, after Schleiden's work on plants (1838).