Gymnosperms were the dominant form of plant life on land:

Question

Quizplus · Accepted Answer

Gymnosperms were dominant during the Mesozoic era, which is when dinosaurs came to dominance. This period lasted from about 252 million years ago to about 66 million years ago. Therefore, option A is correct. Option B is incorrect as the discovery of fire by humans has no correlation with the dominance of gymnosperms. Option C is incorrect as ferns evolved before gymnosperms. Option D is incorrect as 20 million years ago is a relatively recent time in geological history, and gymnosperms were dominant much earlier.

Gymnosperms Were the Dominant Form of Plant Life on Land