Why have plants been implicated in the Ordovician and Devonian glaciations,but not the Proterozoic glaciations?
A)Proterozoic plants used anoxygenic photosynthesis.
B)Proterozoic plants had simple root structures that did not increase rock weathering.
C)Land plants had not yet evolved during the Proterozoic.
D)The nonvascular plants present during the Proterozoic did not contribute to global nutrient cycles.

Question

Quizplus · Accepted Answer

Land plants had not yet evolved and colonized terrestrial environments during the Proterozoic, so they could not have contributed to global weathering, nutrient cycling, or albedo changes that could have affected global glaciation.

Why Have Plants Been Implicated in the Ordovician and Devonian