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BIOLOGY

JAMB 2007 - Question 37

Biology 2007 JAMB Past Questions - Question 37: The organelle responsible for sexual reproduction is

Use the diagram to answer question that follows

The organelle responsible for sexual reproduction is

A: II

B: I

C: IV

D: Ill

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Correct Answer

Explanation

DThisis a micronucleus. Two paramecia lie side byside and fuse through their oral grooves: The mega nucleus labelled II disappears ineach- organism. the micronucleus in each pararnecium divides into two. One part called migratory nucleus migrates into the opposite paramecium or conjugal and fuses with the other half called stationary nucleus. there after the conjugants separate each ex-conjugant under goes binary fission twice to produce four paramecia. the part labelled is the food vacuole.