Which groups are more closely related? A. Artiodactyls and Perissodactyls B. Proboscideans and tubulidentates

Which of the following is necessary for natural selection? A. The proliferation of organisms better able to survive B. Mass extinction events like the extinction of the dinosaurs

How many traits are shared by Chordates and Flatworms?

What is one tool scientists use to determine when one period of geologic time begins and ends?

Which group of mammals is most closely related to sirenians?

Which of these behaviors leads to evolution? A. Many birds migrate south to warmer areas during the cold winter months B. Your friends are vaping so you do too.

Which of the following is necessary for natural selection? A. Genetic drift of a small population B. Competition for limited resources

How many common ancestors do Perissodactyls and hyracoids share?

Name 3 things that are evidence of evolution

Which type of resistance developed last?

Which of the following is necessary for natural selection? A. Plasmid transfer from one bacterium to another B. The potential for a species to increase in number

Which two groups of animals are most closely related? a. echinoderms and sponges b. arthropods and echinoderms c. sponges and flatworms d. arthropods and roundworms e annelids and chordates f. cnidarians and echinoderms

What common change contributed to each of the Earth's five major mass extinctions?