TLS Online TPP Program

#Question id: 5029


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

#Unit 11. Evolution and Behavior
  1. the emergence of predator-prey relationships between animals

  2. the accumulation of diverse adaptations, such as shells and different modes of locomotion

  3. the movement of animals onto land

  4. the evolution of Hox genes that controlled development