Well, we can't see such tiny small things with just a naked eye. So they invented microscopes. The answer is because no microscopes were invented. The first person to build a microscope was Robert Hooke. In 1665 Robert Hooke observed a thin slice of cork through a microscope.
too small for the naked eye, no microscopes
First observed cells were plant cells. Robert Hook observed cork cells.
In cooking, the onion would caramelize.
Robert Hooke was the person who invented the microscope and first observed the cells in a cork.
Robert Hook observed cells first. He used a simple microscope
The cell was first discovered by Robert Hooke in 1665, which can be found to be The cells in animal tissues were observed after plants.
No microscope
Hahah
First observed cells were plant cells. Robert Hook observed cork cells.
In cooking, the onion would caramelize.
Robert Hooke was the person who invented the microscope and first observed the cells in a cork.
its because there was no way to see them
Matthias Schleiden first observed plant cells, or at least first came up with a part of cell theory including cells.
no
Robert Hooke
The work done gave rise to the theory of cells.
Robert Hooke first observed cells in cork.
Robert Hook observed cells first. He used a simple microscope