About 450 Million Years Ago, the Terrestrial Landscape on Earth

Question

About 450 million years ago, the terrestrial landscape on Earth would have
A) had nonvascular green plants similar to liverworts forming green mats on rock.
B) been completely bare rock, with little pools that contained bacteria and cyanobacteria.
C) looked very similar to that of today, with flowers, grasses, shrubs, and trees.
D) been covered with tall forests in swamps that became today's coal.

Accepted Answer

Around 450 million years ago, during the Ordovician period, the first terrestrial plants likely resembled nonvascular green plants, such as liverworts, forming mats on rocks. This period marks the colonization of land by life, starting with simple, nonvascular plants before the evolution of more complex vascular plants and eventually forests.