Q.

Which one of the following is commonly known as Pond Silk'?

A. Spirogyra
B. Rhizopus
C. Yeast
D. Ulothrix
Answer» A. Spirogyra
Explanation: Pond silk is the common name of Spirogyra (algae) because it is very slimy in shape. It is also known as pond silk, water silk, pond scum or mermaid's trees because of its bright green silky appearance. Its filaments shine like silk due to the presence of mucilage.
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