- Place the scanning objective above the specimen by clicking it into place.
- To move the stage all the way up, use the coarse adjustment knob.
- Use the fine adjustment knob to focus the specimen.
- To improve contrast, adjust the iris diaphragm and/or the light control knob.
- Move a given structure to the center of your field of view using the mechanical stage controls.
<h3>What is epithelial cells ?</h3>
Epithelial cells are the cells that cover the inside and outside of your body's surfaces. They can be located on your skin, blood vessels, and organs such as your urinary tract.
<h3>What does it mean if my epithelial cells are high?</h3>
If urinalysis findings show a moderate or high number of epithelial cells, it may indicate the following medical conditions: Kidney illness Liver disease Yeast infections Urinary tract infections Certain kinds of cancer.
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1) One way is through radiographs. Scientists have studied the spectrum that distant nebulas give off and they have managed to identify molecules that can be found in there. Among them there is hydrogen and various nitrogen and carbon molecules; even alcohol has been found some of them. Another way is by sending probes to asteroids that check not only for simple organic molecules but also aminoacids and nucleotides. A third way was the Urey Miller experiment. There, some basic atoms that can be found in space (nitrogen, hydrogen and carbon) where put together with a spark in a flask. The mixture turned brown and produced complex organic molecules quite soon. This finding makes a case for complex organic molecules being produced in space and thus it is possible that they were transferred to Earth.
2) Geothermal vents are a source of hot water and raw nutrients such as sulphur. The main theory about the genesis of life around vents is that the cells started exploiting the pH or the thermal gradient near those vents and thus had a way to produce energy. The experimental set up for this is a chemical garden, an environment that simulates those alkaline and metallic conditions and yields hollow, plant-like structures. Also some metals in the vents are great catalysts for chemical reactions in organisms. Also fossilised microbes have been found beneath such vents.
Sprinkler irrigation , surface irrigation,subsurface and drip irrigation
An environmental change than an animal must respond to could be a change in climate which affects humidity and temperature. If it could not adapt, it will die out and only the ones that could adapt will live on. This is called natural selection
<span>C) <span>. <span> The acceleration of the cart will more than double</span></span></span>