A) Chlamydomonos
B) Spirogyra
C) Ulothrix
D) Volvox.
Correct Answer: B
Solution :
: In most of the species of Spirogyra asexual reproduction does not take place, motile zoospores are never found in any species. Gametes are dissimilar physiologically, oval and non-ciliated. Male gamete is motile, just like an Amoeba. Gametes do not float in water.
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