Which evolutionary change was not one of the four primary milestones contributing to the evolution of the seed?

Question

Quizplus · Accepted Answer

The proliferation of flagellated sperm is not a milestone in the evolution of the seed. The evolution of seeds primarily involved adaptations that reduced reliance on water for fertilization, such as the protection of gametophytes and the evolution of the ovule, rather than the proliferation of flagellated sperm, which is a feature more associated with non-seed plants that require water for sperm mobility.

Which Evolutionary Change Was Not One of the Four Primary