In which one of the following plant species can self-pollination never occur either naturally or artificially?
A
Zea mays
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B
Gossypium hirsutum
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C
Saccharum officinarum
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D
Carica papaya
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Solution
The correct option is DCarica papaya Dioecious flowers can never undergo self pollination either naturally or artificially. Carica Papaya are dioecious. The flowers are five-parted and highly dimorphic; the male flowers have the stamens fused to the petals. . Male and female flowers are borne in the leaf axils, and the males are multiflowered dichasia, and the female flowers are in few-flowered dichasia.