What is thought to be the first major derived feature that separates land plants from algae?

Question

Quizplus · Accepted Answer

One major derived feature of land plants is the protection of the embryo within the female reproductive structure. While algae have different reproductive strategies, they do not have a specialized structure to protect developing embryos. Chlorophyll a, glucose production, and cellulose in cell walls are characteristics shared by both algae and land plants. Cell walls themselves are not a unique feature to land plants as many types of algae, as well as fungi and bacteria, also have cell walls.

What Is Thought to Be the First Major Derived Feature