AP BIOLOGY

Detailed explanation-1: -The microscope is the technology which helped advance cell theory. This is because microscopes could be used to visualize processes such as cell division which are critical to some tenets of cell theory.

Detailed explanation-2: -The invention of the microscope led to the discovery of the cell by Hooke. While looking at cork, Hooke observed box-shaped structures, which he called “cells” as they reminded him of the cells, or rooms, in monasteries. This discovery led to the development of the classical cell theory.

Detailed explanation-3: -Then, in the 1950s, a new type of the microscope was invented. Called the electron microscope, it used a beam of electrons instead of light to observe extremely small objects. With an electron microscope, scientists could finally see the tiny structures inside cells.

Detailed explanation-4: -Two types of electron microscopy-transmission and scanning-are widely used to study cells. In principle, transmission electron microscopy is similar to the observation of stained cells with the bright-field light microscope.