Answer: Schleiden and Schwann.
- A Hooke and Darwin
- B Schleiden and Schwann
- C Mendel and Morgan
- D Watson and Crick
Correct answer: B. Schleiden and Schwann
Explanation: Matthias Schleiden (plants) and Theodor Schwann (animals) proposed cell theory in 1838-1839.
Animal cell structure with major organelles labeled. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.