DENDROLOGY

Detailed explanation-1: -Conifers, which are monoecious plants, produce both male and female cones. Known as pollen cones, the male cones produce microspores, which result in pollen grains, also known as male gametes. The sperm cells will eventually enter the egg cells through a pollen tube.

Detailed explanation-2: -Cones: male and female reproductive structures. Female cones are diploid tissue produced by the dominant sporophyte stage. Meioses occurs inside the female cone to produce megaspores. Megaspores develop, while still attached to the cone, into female gametophytes.

Detailed explanation-3: -The female pine cone, or megastrobilus, produces the ovule, or unfertilized seed. Scales (modified leaves) on the female cone open to receive pollen, then close. Fertilization takes place late the following spring. Over a two to three year period after fertilization, the woody female pine cone develops.