Discussion
First fossil record of vascular plants appeared in the .................. period.
Answer: A
The first vascular plant fossils appear in the Silurian period.
The earliest known vascular plants, such as Cooksonia, are found in rocks of the middle Silurian, about 430 million years ago. They were small, leafless, branching stems with sporangia at the tips, and vascular plants then diversified rapidly in the Devonian.
The Cambrian is too early, with no land plants yet. The Triassic and Jurassic are Mesozoic periods, by which time ferns, conifers and cycads were long established.
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