To observe the lower layer of a sample using a microscope, you should adjust the focus by turning the fine adjustment knob slowly to bring the lower layer into view. This will help bring the sample into sharper focus so you can see details on the lower layer more clearly.
To observe a skin cell at the highest magnification through a microscope, you should first place the skin cell slide on the microscope stage, focus the microscope using the coarse and fine focus knobs, adjust the light intensity, and then increase the magnification to the highest level possible on the microscope objective.
A smear specimen should be fixed by air-drying the sample or by heat-fixing the slide. This helps to preserve the cellular morphology and prevent degradation of the sample during staining and observation under a microscope. Fixation also improves the adherence of the cells to the slide, making it easier to analyze the sample.
You should adjust the fine focus knob to sharpen the image when viewing the onion cell under high-power objective (HPO) on a microscope. Rotate the knob gently to focus the specimen until the image appears clear.
A dropper or pipette is typically used to transfer a small amount of the sample containing the protists onto a microscope slide. This ensures precise and controlled placement of the protists for viewing under the microscope.
The student should use a light microscope to observe plant cells as they grow and divide. Light microscopes are more suitable for observing live cells in real time due to their lower energy levels, which are less likely to damage or alter the cells during observation. Electron microscopes, while capable of higher resolution, are not as ideal for observing living cells as they require a vacuum environment and the cells must be fixed and dehydrated prior to imaging.
To observe a skin cell at the highest magnification through a microscope, you should first place the skin cell slide on the microscope stage, focus the microscope using the coarse and fine focus knobs, adjust the light intensity, and then increase the magnification to the highest level possible on the microscope objective.
With a microscope
To view a greater portion of a specimen under a microscope, a student should switch to a lower magnification objective lens, such as a 4x or 10x lens. This allows for a wider field of view, making it easier to observe larger areas of the sample. Additionally, the student should ensure the stage is properly positioned and the specimen is centered before adjusting the focus. Always refocus gently to avoid losing sight of the specimen.
The scientist should use a light microscope.
There are a few things students should do when studying fresh mounts of animals cells. Students should adjust the microscope.
Angela should use a microscope to observe living algae from pond water, as it will allow her to see the microscopic details of the algae. A sample of pond water should be placed on a microscope slide, possibly with a cover slip to protect the lens. Additionally, a pipette can be helpful for transferring the water sample to the slide without introducing contaminants.
You could reuse the microscope to observe something else, store it, or let someone else borrow it, etc.
The scientist should use an electron microscope
A scanning electron microscope (SEM) will be ideal to observe the pores of human skin. A compound light microscope will suffice to view the sex of a fruit fly. A compound light microscope can also be used to observe the spores of a fern.
The scientist should use a light microscope.
A lower magnification, such as 40x or 100x, should be used to observe the largest field of view of an insect wing. Higher magnifications may provide detailed views of particular structures but will limit the overall field of view available to observe.
To observe the aortic arches of an earthworm, you can use a dissecting microscope or a magnifying glass. It's advisable to carefully dissect the earthworm to expose the internal structures, including the aortic arches, for better observation.