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Q.

An organism of kingdom plantae grows in marine waters. It is having laminarin as reserve food materials and its zoospores have two unequal flagella on the lateral side. Its frond is dichotomously branched and shows oogamy during sexual reproduction. The organism is identified as  

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a

Ectocarpus

b

Dictyota 

c

Porphyra

d

Polysiphonia 

answer is C.

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Detailed Solution

Dictyota has dichotomously branched frond. It is a brown alga and has laminarin as reserve food material, pyriform zoospores have two unequal flagella on the lateral side and lives in marine waters. Ectocarpus is also a brown alga but not having frond with dichotomous branching.

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