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Question

Which of the following, comprises of members of the same class of algae?


  1. Sargassum, Polysiphonia, Dictyota and Laminaria.

  2. Chara, Saragassum, Porphyra and Gelidium.

  3. Ectocarpus, Sargassum, Polysiphonia and Ulothrix.

  4. Polysiphonia, Porphyra, Gracilaria and Gelidium.


Solution

The correct option is D

Polysiphonia, Porphyra, Gracilaria and Gelidium.


Polysiphonia, Porphyra, Gracilaria and Gelidium belong to Rhodophyceae or red algae. They are an ancient group of algae consisting about 5000 living species. They possess chlorophyll a, phycobilins, floridean starch as reserve food, and abundant phycocolloids, but they lack flagellated cells.

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