Multiple choice Development of Funaria gametophyte is always initiated from antheredium protonema archegonia capsule Reveal answer Fill a bubble to check yourself B Correct answer Explanation A protonema is a thread-like chain of cells that forms the earliest stage (the haploid phase) of a bryophyte life cycle. When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore.