Electron Microscopy is the technology which is used to for obtaining high-resolution pictures of a "biological and non-biological" specimen, there are two types of Electron Microscope such as "Scanning Electron Microscope and Transmission Electron Microscope".
Electron Microscopy it uses electrons instead of light to obtain sample image, it uses electromagnets to focus the electron beams, it achieves higher magnification and resolution than the optical scopes.
This might have an evolutionary advantage as to why the egg behaves such. Presumably, this can help the yolk develop leaving it away from any inconvenient circumstance
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