DENDROLOGY

Detailed explanation-1: -Cones form on a mature sporophyte plant. Inside male cones, male spores develop into male gametophytes.

Detailed explanation-2: -The sporophyte produces spores by meiosis. The spores grow into gametophytes. The gametophytes produce gametes (eggs and sperm). Fusion of gametes (fertilization) produces a zygote.

Detailed explanation-3: -After fertilization, the diploid sporophyte grows out of the archegonium on the gametophyte, and the sporophyte eventually grows much larger than the gametophyte and becomes the free-living, dominant form of the life cycle.

Detailed explanation-4: -The male and female gametophyte structures are present on separate male and female cones in gymnosperms, whereas in angiosperms, they are a part of the flower.