Male gametes are flagellated in

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(B) In $Ectocarpus$,which belongs to the class $Phaeophyceae$ (brown algae),the male gametes are motile and possess two laterally attached flagella.$A

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Ectocarpus

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(B) In $Ectocarpus$,which belongs to the class $Phaeophyceae$ (brown algae),the male gametes are motile and possess two laterally attached flagella.$Anabaena$ is a cyanobacterium (blue-green algae) that reproduces through akinetes or heterocysts,and its gametes are not flagellated.$Spirogyra$ (green algae) exhibits conjugation,where the gametes are non-flagellated (isogamous or physiologically anisogamous).$Polysiphonia$ (red algae) is characterized by the complete absence of flagellated stages in its life cycle.

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