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Question

Assertion :Batrachospermum is called as 'frog spawn alga'. Reason: This looks like eggs of frog.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Batrachospermum is one of the freshwater forms of Rhodophyceae. This alga is found in slow running shallow streams and on the banks of lakes and ponds. It is more commonly found in well-aerated waters. The plants are blue-green, olive-green, violet and reddish in colour. The variation in colour is as a result of the differences in light intensity. The species which grow in deep water are reddish or violet in colour whereas, the species growing in shallow water are olive-green in colour. The alga is also known as the 'frog spawn' or 'the eggs of frog' because the plants are mucilaginous, moniliform or beaded in appearance to the naked eye. The thallus is filamentous, profusely branched and with a mucilaginous feel. Hence, looks like frog eggs. The plants may reach a length of twenty centimetres and may easily be collected from well-aerated water bodies. Thus, the correct answer is option A.


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