Identifying Polluted Water
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1. Spirillum bacteria from highly polluted water
2. Sphaerotilus bacteria forming long chains from putrid water
3. Wasserbluthe (Microcystis), blooming in stagnant water
4. Chlamydomonas, one-celled alga in euthrophic water
5. Sirogyra, filamentous alga in nutrient-rich water
6. Cladophora, green alga from moderately polluted water
7. Rotifers, small animals from clear water
8. Carcgesium, ciliate from moderately polluted water
9. Diatoms, mixed algae from scarcely polluted water
10. Water hyacinth, plant from barely polluted water, rhizome
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