Dioecious sporophytes are seen in

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Carica

Chara

Sphagnum

Cucurbita

answer is A.

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Detailed Solution

Dioecy is a condition where the male and female reproductive organs are present on separate individuals. Carica (papaya), is not monoecious but rather is dioecious, meaning that male and female flowers are not found on the same plant.

In Cucurbita, which includes pumpkins, squash, and gourds, male and female flowers are borne mostly on same plants, making them monoecious.

Chara, is a genus of green algae that exhibit oogamous reproduction, where the female gamete is larger than the male gamete, but they are not dioecious.

Sphagnum (peat moss), is a genus of bryophytes that have monoecious sporophytes, meaning that male and female reproductive organs are present on the same sporophyte.

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