AP BIOLOGY

Detailed explanation-1: -Strobilus or cone is the reproductive structure of gymnosperms. Both male and female strobili can be present on the same (seen in Pinus) or on different trees (seen in Cycas). Gymnosperm plants are heterosporous. They produce different spores, which are the haploid microspores and megaspores.

Detailed explanation-2: -The reproductive structures in gymnosperms are called cones or strobili. The strobili bearing microsporophylls and microsporangia are called microsporangiate or male strobili. The cones bearing megasporophylls with ovules or megasporangia are called macrosporangiate or female strobili.

Detailed explanation-3: -Gymnosperms are plants that have seeds but no flowers. The seeds of these plants are on cones or in cups.

Detailed explanation-4: -gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule-unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally, “naked seeds”) are borne in cones and are not visible until maturity.

Detailed explanation-5: -Gymnosperms are one of the ancient plant groups with seed production. They are a group of vascular plants with naked (without ovary) seeds. Gymnospems are also heterosporous.