AQA Biology Flashcards
Sample (from 1183 notes)
|Front||How does scanning electron microscope work|
|Back||A beam of electrons passes across the surface and the secondary electrons are detected. Image produce is 3-D. The specimen is stained in heavy metals such as(osmium, lead, and gold). System is in a vacuum so there are no collisions with air particles restricting electrons getting to the surface of the specimen|
|Back||Living features of the ecosystem e.g food|
|Header||Structure of the heart|
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