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  4. Megasporophylls, which are arranged spirally and acropetally on the central axis of the female cone of Pinus bear

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Q. Megasporophylls, which are arranged spirally and acropetally on the central axis of the female cone of Pinus bear

AMUAMU 2000

Solution:

The female cone axis of Pinus bears a composite structure comprising of megasporophylls. Each megasporophyll consists of a lower bract scale and a large upper ovuliferous scale. The ovuliferous scale bears on its upper (adaxial) surface two ovules (megasporangia) side by side.