Both gymnosperms and angiosperms bear seeds, then why are they classified separately?

– Seed Enclosure: Gymnosperms have naked seeds not enclosed within an ovary, whereas angiosperm seeds are enclosed within a fruit. – Reproductive Structures: Gymnosperms lack flowers; their reproductive organs are in cones. Angiosperms have flowers with differentiated structures like stamens and carpels. – Wood Anatomy: Gymnosperms typically have non-porous wood lacking vessels; angiosperms have porous wood with vessels. – Endosperm Formation: Gymnosperms produce haploid endosperm before fertilization; angiosperms form triploid endosperm after double fertilization.