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Question

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 D Carica 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.
Hence the correct answer is (D).

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