Cell theory in 1839 was first proposed by
ASchleiden and Schwann
BWatson and Crick of DNA fame
CMendel and Morgan of genetics fame
DDarwin and Wallace of evolution fame
Answer & Solution
Correct answer: A. Schleiden and Schwann
1. The chapter section 2.3 names Matthias Schleiden and Theodor Schwann.
2. They proposed cell theory in 1839.
3. Virchow's 1858 addition was that all cells arise from pre-existing cells.
4. So option A names the right pair.
_Source: Selina Concise Biology Class 9, Ch 2 Cell, the Unit of Life (Mistral OCR'd PDF), section 2.3_
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