- (A) Protozoa
- (B) Bacteria
- (C) Virus
- (D) Neutron
_______ is considered the largest glacier of Pakistan.
March 18, 2026
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- (A) Siachen Glacier
- (B) Tirich Mir Glacier
- (C) Biafo Glacier
- (D) Hispar Glacier
What was first seen by compound microscope?
What was first seen by compound microscope?
Bacteria were the first microorganisms that people actually observed with their own eyes using a microscope. Before that, people used simple lenses, such as magnifying glasses, to take a peek at larger objects, such as insects. However, in 1676, Antonie van Leeuwenhoek turned the world upside down by observing bacteria in a sample of water. He chose to use high-quality single-lens microscopes instead of the early compound microscopes, which were a bit crude in terms of their resolution at the time. However, his findings laid the foundation for all future work done using compound microscopes.
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