Which of these is a niche that Cambrian animals occupied―that,as far as we know,their predecessors did not?
A) grazing on microbial mats
B) feeding on organic debris
C) absorbing nutrients across membranes
D) predation while actively swimming
E) None of the above.

Question

Quizplus · Accepted Answer

During the Cambrian explosion, a significant diversification of life forms occurred, including the emergence of animals that could actively swim and engage in predation. This was a new ecological niche that was not occupied by their predecessors, who were more limited in their mobility and methods of obtaining food.

Which of These Is a Niche That Cambrian Animals Occupied―that,as