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NEET2003BotanySexual Reproduction in Flowering PlantsActual

Sexual reproduction in Spirogyra is an advanced feature because it shows:

Options

  1. Adifferent sizes of motile sex organs
  2. Bsame size of motile sex organs
  3. Cmorphologically different sex organs
  4. Dphysiologically differentiated sex organs

Correct answer

D. physiologically differentiated sex organs

Step-by-step solution

In Spirogyra, the sexual reproduction involves the fusion of two morphologically identical isogametes and physiologically dissimilar anisogametes. This is a case of primitive anisogamy.

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