How to use in-sentence of “gymnosperms”:
– The flowering plants have long been assumed to have evolved from within the gymnosperms; but the known gymnosperms form a clade which is distinct from the angiosperms.
– The gymnosperms and angiosperms together make up the spermatophytes or seed plants.
– The evolution of heterospory and endospory were among the earliest steps in the evolution of seeds of the kind produced by gymnosperms and angiosperms.
– Most of the Gymnosperms became extinct in the Cenozoic era.
– Later, in the Triassic Period, Pinophytaconifers, ginkgos, cycads and other gymnosperms appeared, and subsequently flowering plants in the Cretaceous period.
– They are different from the gymnosperms because angiosperms bear flowers, and have enclosed ovules.
– Some gymnosperms and their insect pollinators are co-evolved for pollination.
– There is evidence that some gymnosperms were insect-pollinated in the Triassic period, but pollination by animals is not the main method in this group.
