Question

Scientist hypothesis that some Cambrian period organism are distant ancestors of present day organism. (True or False)

Answer 1

Answer: true

because, All major animal phyla, save the Bryozoans, have their first appearance during the Cambrian. One of the dominant animal groups that appeared was the trilobites. These now-extinct members of the Phylum Arthroopoda became the dominant animals in many Cambrian marine environments.