Spirogyra is commonly called pond silk because___________________
A
Silk is manufactured from it
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B
It looks like silk thread
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C
It is slimy to touch
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D
All of the above
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Solution
The correct option is B It is slimy to touch
Spirogyra is commonly called pond silk because the outer covering of the cell is made up of pectic substances which gelatinize with water, making it slimy to touch.