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Biology

General

Easy

Question

Which of the following is known as pond silk?

$S p i r o g y r a$
$U l o t h r i x$
$N o s t o c$
$A n a b a e n a$

The correct answer is: $S p i r o g y r a$

The cells of $S p i r o g y r a$ are longer than their breadth. The cell wall is two layered. The inner wall is made up of cellulose and outer of pectose, when pectose comes in contact with water it gives the filament slimy or slippery. Hence, the alga is called pond silk.

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Which one of the following is an example of chlorophyllousthallophyte?

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Choose the correct option

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I) The tea prepared from $p o l y t r i c h u m c o m m u n e$ is used to dissolve kidney and gall bladder stones
II) Many chemical products such as alcohol, ammonium sulphate, paraffin, brown dye, etc., can be obtained from peat
Choose the correct option

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