Which of the following was probably the least important factor in bringing about the Cambrian explosion? a. the emergence of predator-prey relationships b. an increase in the concentration of atmospheric oxygen c. the movement of animals onto land d. the origin of Hox genes

Video transcript

Hello, everyone here. We have a question asking what significant evolutionary event happened during the Cambrian explosion. During the Cambrian explosion? There was an emergence of incredible diversity of life. So a there was an emergence of an incredible diversity of life forms. That is correct. B there was a massive explosion that caused universal species extinction. That is incorrect. See there was a huge sea level rise, causing the habitat shift for many marine species. That is incorrect. D there was an extreme drought, eliminating many sensitive species that is incorrect. So our answer here is a there was an emergence of an incredible diversity of life forms and some of these major animal groups are still alive today. Thank you for watching. Bye.