Question

the header questions to help you organize the main ideas in your outline. reading check 1. explain why didn’t scientists know about cells before the microscope was invented?

Explanation:

Cells are extremely small. Without a microscope, which can magnify tiny objects, scientists couldn't observe cells. The human eye has a limited ability to see very small things. So, before the microscope was invented, there was no tool to make cells visible for study.

Answer:

Cells are too small to be seen with the naked eye. Before the microscope (which can magnify small objects) was invented, there was no way for scientists to observe cells.