Which of the Following Was the Least Likely Factor Causing

question 77

Multiple Choice

Which of the following was the least likely factor causing the Cambrian explosion?

• A)the emergence of predator-prey relationships between animals
• B)the accumulation of diverse adaptations, such as shells and different modes of locomotion
• 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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