Which description is common to both gymnosperms and angiosperms?

These gymnosperms soon became the dominant plants. The Mesozoic is sometimes called the Age of cycads.

But their success was  only short-lived. During the mid to late Mesozoic, the first flowering plants or angiosperms appeared.

The mesozoic is Triassic

protist eukaryotes that are not plants, animals, or fungi ("misfits")

true is the final answer!