Final answer:
In Biology, scientists observed microscopic organisms with improved lenses in the first simple microscopes, but also perpetuated the idea of spontaneous generation in the late 1600s.
Step-by-step explanation:
The subject of this question is Biology.
Famous scientists Anton Van Leeuwenhoek and Robert Hooke used improved lenses incorporated into the first simple microscopes to observe many types of microscopic organisms in the late 1600s. However, they also perpetuated the idea of spontaneous generation, which stated that certain organisms could arise spontaneously from non-living matter.
This belief in spontaneous generation was later disproven by experiments conducted by Louis Pasteur in the 19th century, using advanced microscopes and controlled conditions.
Learn more about Microscopic organisms