LIFE SCIENCE

Detailed explanation-1: -The light microscope remains a basic tool of cell biologists, with technical improvements allowing the visualization of ever-increasing details of cell structure.

Detailed explanation-2: -Electron microscopes can be used to examine not just whole cells, but also the subcellular structures and compartments within them.

Detailed explanation-3: -Cells vary in size. With few exceptions, individual cells are too small to be seen with the naked eye, so scientists use microscopes to study them. A microscope is an instrument that magnifies an object. Most images of cells are taken with a microscope and are called micrographs.

Detailed explanation-4: -Place the glass slide onto the stage. Be careful pushing it under the clips that the cover slide doesn’t move or crack. Turn the coarse focus knob slowly until you are able to see the cells. Turn the fine focus knob slowly until the cells are in focus and you can see them clearly.

Detailed explanation-5: -In a scanning electron microscope, a beam of electrons moves back and forth across a cell’s surface, creating details of cell surface characteristics. In a transmission electron microscope, the electron beam penetrates the cell and provides details of a cell’s internal structures.