24. History of Life on Earth
History of Life on Earth
Multiple Choice
Multiple ChoiceWhich of the listed examples is a current hypothesis regarding the Cambrian explosion?
A
An increase in atmospheric CO2 led to an explosion of plants and life-forms that fed on plants.
B
Increased numbers of predator species led to a dramatic decline in prey species.
C
A rise in atmospheric nitrogen led to success of large animals with higher metabolic rates.
D
All of the listed responses are correct.
E
Evolution of the Hox gene complex provided developmental flexibility.
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