Multiple choice In which of the following periods do we find first evidence of land plants? In Archeozoic era In Mesozoic era In Paleozoic era In Coenozoic era Reveal answer Fill a bubble to check yourself C Correct answer Explanation The earliest evidence of land plants dates to the Ordovician period (485-444 million years ago), which is part of the Paleozoic era. This marks the transition from aquatic to terrestrial plant life.