a (a) : Ectocarpus produces biflagellate gametes. Anabaena is a cyanobacteria and does not reproduce sexually. Spirogyra produces nonflagellated male gamete during conjugation, where entire cell content functions as gamete. Polysiphonia also produces non flagellated spermatia.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.