Male gametes are flagellated in

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(B) In the plant kingdom,specifically among algae,the presence of flagellated male gametes is a characteristic feature of certain groups.$1$. $Anabaen

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Ectocarpus

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(B) In the plant kingdom,specifically among algae,the presence of flagellated male gametes is a characteristic feature of certain groups.$1$. $Anabaena$ is a cyanobacterium (blue-green algae) that reproduces via akinetes or hormogonia and does not produce flagellated gametes.$2$. $Ectocarpus$ is a brown alga (Phaeophyceae) that produces biflagellated zoospores and gametes.$3$. $Spirogyra$ is a green alga (Chlorophyceae) that undergoes conjugation,where the gametes are non-flagellated (isogamous).$4$. $Polysiphonia$ is a red alga (Rhodophyceae) which is unique because its life cycle completely lacks flagellated stages.Therefore,$Ectocarpus$ is the correct answer.

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