Monoecious condition is found in

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(D) The monoecious condition refers to the presence of both male and female reproductive structures on the same individual plant or gametophyte. In $P

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Pteridium

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(D) The monoecious condition refers to the presence of both male and female reproductive structures on the same individual plant or gametophyte. In $Pteridium$ (a fern),the prothallus (gametophyte) is monoecious,meaning it bears both antheridia (male sex organs) and archegonia (female sex organs) on the same thallus. $Cycas$ is dioecious. $Selaginella$ is monoecious but produces different types of spores (heterosporous). $Pinus$ is monoecious,but the question typically refers to the gametophytic condition in the context of pteridophytes. Given the options,$Pteridium$ is the classic example of a monoecious gametophyte.

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