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B
Panicle of spikeIets
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C
Spadix of spikelets
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D
Catkin
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Solution
The correct option is D Spadix of spikelets Zea mays, commonly known as corn or maize is a cereal grain belonging to the family Poaceae. In Zea mays, the inflorescence of female flowers is spadix of spikelets arising from the axil of a lower leaf. A large number of spikelets are arranged closely on the fleshy axis. It remains surrounded by a few large hyaline bracts called spathes. Each spikelet is two-flowered and has protective glumes. Of the two, usually the upper flower is fertile and the lower one aborts. Lodicules are absent.