Question

Biological treatment of water pollution is done with the help of

• A. Phytoplankton
• B. Lichens
• C. Fungi
• D. None of the above

Answer 1

Answer: (A)

Phytoplankton

Phytoplankton are minute aquatic plants. In terms of numbers, the most important groups of phytoplankton include diatoms, cyanobacteria and dinoflagellates. Phytoplanktons can be used in biological treatment of water pollution.
Lichens are symbiotic association between fungi and algae. They are pioneers colonisers of barren rocks. Lichens do not grow in polluted areas.
Fungi are heterotrophic organisms, which grow as parasites or decomposers.