Answer: d. ovulate cone
Explanation:
The female cone, also known as megastrobilus, seed cone, or ovulate cone in conifers are said to be compounds. These strobiles are formed by an axis with modified sterile leaves called bracts. Each of these bracts supports an ovuliferous scale, which is the structure that carries the eggs (two most of the time). This ovuliferous scale consists of a modified lateral branch and not just a leaf. Each ovum is formed by a megasporangium (multicellular nucleus) surrounded by an integument with an opening (micropyle). In other words, the ovulate cone is most directly related with the production of the integument.
Pines are mono trees, with limbs measuring 2 to 100 meters high. Pines are typically resinous, with spiral-shaped acicular leaves. Female strobiles are woody and large, typically with two winged seeds per scale.
