Final answer:
Ferns are a type of eusporangiate fern that have large leaves called fronds and small sporangia-containing structures. They go through a life cycle with a dominant sporophyte stage.
Step-by-step explanation:
Ferns are a type of eusporangiate fern. They are distinguished by large leaves called fronds and small sporangia-containing structures called sori, which are found on the underside of the fronds. The dominant stage of a fern's life cycle is the sporophyte, which consists of the fronds. Most ferns are homosporous, meaning they produce a single type of spore. The spores are released into the air from the sporangium and germinate to form a heart-shaped gametophyte which eventually develops into a new fern sporophyte.