21. Evolution

How does embryology provide evidence for evolution?

Which of the following statements best describes the evolution of HIV?

On an evolutionary tree, __________.

Which of the following provides the strongest evidence that Mars once had rivers and running water?

Which of the following is an example of macroevolution?

Lyell's principle of uniformitarianism __________.

Scientists think that all of life on Earth originated from which type of organism?

What is one reason that Earth was initially inhospitable to life on land?

Which of the following is true of deuterostomes in the context of evolution and natural selection?

Which of these best demonstrates unity among organisms in the context of evolution and natural selection?

Which best explains a primary reason for the inability of life to exist in Earth's early atmosphere?

Vestigial organs are __________.

At the time Charles Darwin sailed on HMS Beagle, __________.

How do vestigial structures support the theory of evolution?