When using a light microscope you need a very thin layer of cells on your slide. This how to video is a simple demonstration how to prepare onion cell Slides and human cheek cell slides.
Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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