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Sexual reproduction in Spirogyra is an advanced feature because it shows
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- physiologically differentiated sex organs
- different sizes of motile sex organs
- same size of motile sex organs
- morphologically different sex organs
Correct Option: A
Sexual reproduction in Spirogyra occurs by conjugation involving union of two gametes. The fusing gametes are similar but one is more active and passes onto the other cell. This differentiation of gametes is called physiological anisogamy.
