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

Question

Megasporophylls, which are arranged spirally and acropetally on the central axis of the female cone of Pinus bear (A) 4 megasporangia on dorsal surface (B) 2 megasporangia on ventral surface (C) 2 megasporangia on dorsal surface (D) 4 megasporangia on ventral surface

Tardigrade Admin · Accepted Answer

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.

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

4 megasporangia on dorsal surface

2 megasporangia on ventral surface

2 megasporangia on dorsal surface

4 megasporangia on ventral surface

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.