A) Spirogyra
B) Ulothrix
C) Volvox
D) All of these
Correct Answer: A
Solution :
The sexual reproduction in Spirogyra is accomplished by conjugation. It is of two types i.e., scalariform and lateral conjugation. The gametes of Spirogyra are distinguishable by their degree of motality. This difference in behaviour is called physiological anisogamy Sexual reproduction in Ulothrix is isogamous type . The fusion takes place between gametes of one filament with those of the other having a different genetic constitution. Sexual reproduction in Volvox is of advanced type i.e., with well developed oogamy. The male gametangia (gamete bearing) are called, antheridia or androgonia while the female oogonia.
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