Question

from about 450 to 300 million years ago, ______ dominated earth's vegetation, and then about 300 million years ago, ______ began to become more prominent.

Answer 1

From about 450 to 300 million years ago, bryophytes dominated the earth's vegetation, and then about 300 million years ago, gymnosperms began to become more prominent.

Evolution of plants

About 450 to 300 million years ago, most of the plants as we currently have them are yet to evolve according to evolutionists.

Instead, seedless vascular plants such as bryophytes were around. Many years after, these seedless plants evolved into vascular plants with seeds that are not enclosed in fruits.

Vascular plants with seeds but without fruits are known as gymnosperms. Plants whose seeds are enclosed in fruits, angiosperms, evolved thereafter.

More on plant evolution can be found here: brainly.com/question/13492988

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Answer 2

From about 450 to 300 million years ago, Bryophytes and seedless vascular plants dominated Earth's vegetation, and then about 300 million years ago, Gymnosperms began to become more prominent.