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Q: Antonie van Leeuwenhoek discovered single celled life forms in :
  • A. 1837
  • B. 1674
  • C. 1774
  • D. 1884
Correct Answer: Option B - Antonie Van Leeuwenhoek is credited with discovering single-celled organism, which he referred to as ''animalcules'' in 1674. Using his handcrafted microscopes, he was the first to observe and describe these microorganisms, laying the foundation for the field of microbiology.
B. Antonie Van Leeuwenhoek is credited with discovering single-celled organism, which he referred to as ''animalcules'' in 1674. Using his handcrafted microscopes, he was the first to observe and describe these microorganisms, laying the foundation for the field of microbiology.

Explanations:

Antonie Van Leeuwenhoek is credited with discovering single-celled organism, which he referred to as ''animalcules'' in 1674. Using his handcrafted microscopes, he was the first to observe and describe these microorganisms, laying the foundation for the field of microbiology.