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Monoecious plant of Chara shows occurrence of:

1. stamen and carpel of the same plant
2. upper antheridium and lower oogonium on the same plant
3. upper oogonium and lower antheridium on the same plant
4. antheridiophore and archegoniophore on the same plant

Correct answer: upper oogonium and lower antheridium on the same plant

Solution

Chara is monoecious, meaning both sex organs occur on the same plant. In Chara, the oogonium is borne above the antheridium on the same branchlet, so the correct arrangement is upper oogonium and lower antheridium.

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