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Q.

 Monoecious plant of Chara shows occurrence of

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a

upper antheridium and lower oogonium on the same plant.

b

 upper oogonium and lower antheridium on the same plant.

c

antheridiophore and archegoniophore on the same plant.

d

stamen and carpel on the same plant.

answer is B.

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Detailed Solution

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Chara, a green alga, has upper larger oogonium or female sex organ or nucule and lower, smaller and spherical antheridium or male sex organ or globule at the same node.

(1) Not applicable.

(3) Archegoniophore and antheridiophore are seen on separate plants of a bryophyte Marchantia. It is dioecious.

(4) Stamens and carpels are male and female sex organs of a flower of angiosperms.

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