Solution:
Mosses that belong to the bryophytes have evolved from algae. The fact that protonema has a thallus like body shows that mosses have evolved from algae.
Statement A: Mosses are evolved from algae.
Statement B: Protonema of mosses is similar to some green algae.
Mosses that belong to the bryophytes have evolved from algae. The fact that protonema has a thallus like body shows that mosses have evolved from algae.