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Dried litchi fruits from Fujian showing textured brown shell and opened fruit revealing dark nucleus seed on clean white background for commercial use.
Transmission electron microscope (TEM) micrograph showing the nucleus of a protein-synthesizing cell. The nuclear envelope, chromatin and nucleolus can be seen. The cytoplasm is full of RER.
3d illustration Rutherford's model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths.
Hand holding fresh Zengcheng Guiwei lychee bunch with red textured skin and white nucleus, displaying small tropical fruit harvest in natural garden setting
Dried lychee fruits from Fujian province showing textured brown shells and exposed dark nucleus seeds on clean white background for culinary and botanical uses.

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