The comparative approach allows us to make correlations between traits. When traits occur together, it suggests that one is adaptive in the presence of the other. The first atmosphere was a reducing atmosphere. Name one of the first organisms to colonize land. Green algae were also likely early colonizers.
Evidence suggests that it was the common ancestor of all land plants.
Arthropods were the first terrestrial animals. Graduates only . Describe two major anatomical patterns that would lead you to categorize a tetrapod fossil as an herbivore. Teeth adapted for breaking down plant matter, rib cage large enough to hold a long digestive tract, strong jaw muscles 12. Greater likelihood that sediments will have been converted to metamorphic rock.