Multiple Choice
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.
Correct Answer:
Verified
Correct Answer:
Verified
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