Question

2. Using the earliest microscopes, scientists were able to observeA. the structures inside a cell.B. molecules.C. tiny organisms and cells.

Answer 1

The first microscopes were optical microscopes, which means that the image was enlarged using lenses.

Antonie van Leeuwenhoek was able to observe single cells organisms, as well as red blood cells and spermatozoa, in the 1670s, with single-lens microscopes that were able to magnify the images 300 times.

This means C, tiny organisms and cells, is the right answer.