21. Evolution

Why are choanoflagellates considered to be the ancestor of animals?

What is an example of convergent evolution?

Which of the following was an early selective advantage of a coelom in animals?

How can scientists determine how closely or distantly related fossil organisms are to living organisms?

In what way are herbivores and carnivores alike in the context of evolution and natural selection?

The second major event in the evolution of metabolism was most likely which of the following?

Which of the following could be considered the most recent common ancestor of living tetrapods?

The most ancient branch point in animal phylogeny is that between having:

Which of the following observations helped Darwin shape his concept of descent with modification?

Approximately how many years ago did modern Homo sapiens first appear in Africa?

Which of the following groups evolved after reptiles in the history of life?

Which statement best describes some important characteristics of Ardipithecus?

Which group of vertebrates were the first to successfully invade land?

What did the discovery of Tiktaalik reveal about vertebrate evolution that was previously unknown?

Which of the following statements about vestigial structures is accurate?