Which ofthe following was probably the least important

Chapter 0, Problem 5

(choose chapter or problem)

Which ofthe following was probably the least important factor in bringing about the Cambrian explosion? a. the emergence of predator-prey relationships among animals b. the accumulation of diverse adaptations, such as shells and different modes oflocomotion c. the movement of animals onto land d. the evolution of Hox genes that controlled development e. the accumulation of sufficient atmospheric oxygen to support the more active metabolism of mobile animals

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