24. History of Life on Earth

Single-celled prokaryotes had Earth to themselves for approximately __________.

You are watching a movie in which one of the characters excitedly claims to have found human remains in Asia dated at 10 million years old. The date was obtained by carbon-14 dating. What is your reaction?

What evidence most strongly suggests that an impact by an asteroid or meteorite may have caused the extinction of the dinosaurs?

Approximately how long ago did the first plants appear on Earth?

The early atmosphere on Earth is thought to have lacked which of the following gases?

Many researchers now believe that the first self-replicating molecules were __________.

What were the two major "problems" that had to be solved before plants, animals, and fungi could fully move into terrestrial habitats?

Which of the following occurred during the Mesozoic era?

How does continental drift affect speciation?

In the species selection model, __________ is to macroevolution as __________ is to microevolution.

Although they originated around 180 million years ago, mammals underwent an adaptive radiation starting approximately 65 million years ago. Why?

Abiotically produced vesicles display which of the following rudimentary qualities necessary for life?

What evidence supports the hypothesis that mitochondria and plastids evolved from prokaryotic endosymbionts?

The Miller and Urey abiotic synthesis experiment (and subsequent, similar experiments) showed that __________.

What prokaryotic adaptation occurred during the oxygen revolution and opened up the possibility for energy-demanding multicellular life-forms?