(A) $Ectocarpus$ produces biflagellate gametes.$Anabaena$ is a cyanobacterium and does not reproduce sexually.$Spirogyra$ produces non-flagellated mal

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(A) $Ectocarpus$ produces biflagellate gametes.$Anabaena$ is a cyanobacterium and does not reproduce sexually.$Spirogyra$ produces non-flagellated male gametes during conjugation,where the entire cell content functions as a gamete.$Polysiphonia$ also produces non-flagellated spermatia.