Exam 6: The Origin and Evolution of Life on Earth

Stromatolites date back to approximately

One type of early pre-cell (vesicle) probably consisted of small droplets of

By studying the "Tree of Life" scientists have been able to deduce that life on Earth most likely

The study of stromatolites tells us that the origin of life on Earth must have ocurred

One factor that hampers the use Miller-Urey experiments in studying the chemical processes that may have occurred on the early Earth is that the

What is one piece of evidence that some organelles like mitochondria and chloroplasts within eukaryotes used to be independent prokaryotes that were incorporated into eukaryotic cells?

What is one advantage that primates have over other forms of life?

What is the K-T boundary?

Dust and smoke blown up into the Earth's atmosphere from the massive impact of an asteroid 65 million years ago

What was one reason that RNA was eventually replaced by DNA as the molecule of choice for storing genetic information?

The first self-replicating molecule was probably

Organisms far from each other on the "Tree of Life"

RNA catalysts are known as

What is the "chicken-and-egg" type problem we face when trying to decide which came first-proteins or nucleic acids?

Where in the "Tree of Life" will current organisms be located that are most closely related to the common ancestor of all life on Earth?

One theory for the origin of life suggests that the earth and Life were created by some omnipotent being. This is referred to as

Why are clay surfaces good at promoting the formation of biological polymers?

What is the current state of the "bottom-up" approach to making artificial life in the laboratory, an example of which is the work of Jack Szostak at Harvard University?

The Cambrian Explosion began approximately

Carbon isotope evidence from rocks found in Greenland, although controversial, suggests that life may have