Electron microscope and zip: what they have in common

1. Step 1. Electron microscope — evolved from — Microscope. Overcoming the limit of optics.
2. Step 2. Microscope — is used in — Gram staining. For microscopy.
3. Step 3. Gram staining — uses — Synthetic dye. Aniline dyes.
4. Step 4. Synthetic dye — evolved from — Indigo. Synthesizing natural dyes.
5. Step 5. Indigo — is used in — Jeans. Indigo.
6. Step 6. Jeans — has part — Zip. A zip.

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