Answer:
Explanation:
In 1674 he likely observed protozoa for the first time and several years later bacteria.
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Answer:
in 1674
Explanation:
In 1674, aged 41, Leeuwenhoek made the first of his great discoveries: single-celled life forms. Nowadays these organisms are grouped with the protists – these are mainly single-celled plants and animals.
Answer:
In 1674 he likely observed protozoa for the first time and several years later bacteria.
Explanation: