Q: What instrument has a resolution many times greater than a light microscope, and can be used to see the details on the outside of a cell? Read this paragraph and choose the correct option from the provided answers: Use an electron microscope. This instrument has a resolution many times greater than a light microscope, and can be used to see the details on the outside of a cell. Some electron microscopes can also be used to see the details inside a cell. Choices: - complex microscope - element microscope - molecular microscope - electron microscope A:
electron microscope

Q: What powerful microscopes use a beam of subatomic particles instead of a beam of light? Read this paragraph and choose the correct option from the provided answers: Electron Microscopes In contrast to light microscopes, electron microscopes use a beam of electrons instead of a beam of light. Not only does this allow for higher magnification and, thus, more detail (Figure 3.3), it also provides higher resolving power. Preparation of a specimen for viewing under an electron microscope will kill it; therefore, live cells cannot be viewed using this type of microscopy. In addition, the electron beam moves best in a vacuum, making it impossible to view living materials. In a scanning electron microscope, a beam of electrons moves back and forth across a cell's surface, rendering the details of cell surface characteristics by reflection. Cells and other structures are usually coated with a metal like gold. In a transmission electron microscope, the electron beam is transmitted through the cell and provides details of a cell's internal structures. As you might imagine, electron microscopes are significantly more bulky and expensive than are light microscopes. Choices: - complex microscopes - scientific microscopes - nuclear microscopes - electron microscopes A:
electron microscopes

Q: What is it called when the chance that a certain event will occur? Read this paragraph and choose the correct option from the provided answers: Probability is the chance that a certain event will occur. For example, the probability of a head turning up on any given coin toss is 50 percent. Choices: - mutation - difficulty - procession - probability A:
probability