Exam 18: The History of Life

Miller and Urey's experiments attempting to re- create the prebiotic environment produced prokaryotic cells.

Miller and Urey's experiments attempting to re- create the prebiotic environment produced a rich mixture of complex organic chemicals from simple chemicals.

The first self- replicating molecule was probably .

If you open a can of chicken noodle soup and immediately examine it microscopically, you will find no microorganisms. If you let the open can sit on the shelf for a few weeks and then examine it, you will find many microorganisms. The origin of these microorganisms is most likely

One advantage that enabled the seed plants to greatly surpass the ferns in colonizing the land was the evolution of

All the life- forms found in the Silurian fossil record are still alive today.

Arthropods were able to move onto land because their _ prevented dehydration and provided support.

-The figure illustrates

About 530 million years ago, what adaptation evolved to make fish the dominant predators of the sea?

The scientists usually given credit for disproving the theory of spontaneous generation of bacteria are

Oxygen has a negative influence on the formation of complex organic molecules because it _ with them and changes their structure.

Which is the correct series of events in the evolution of life on Earth?

The "pre- adaptations" of early arthropods that allowed them to evolve into terrestrial forms were

Based on current knowledge about the conditions of early Earth, the first organisms were most likely

Explain why an organism that carries on aerobic metabolism has an advantage over an organism that uses anaerobic metabolism.

Ferns and club mosses had an advantage over earlier plants because they developed

The largest mass extinction event of all time occurred at the end of the

What adaptations did ancient algae have to make as they washed ashore and evolved into land plants?

Arthropods were the first terrestrial animals because their exoskeletons allowed them to withstand

Which era saw the rise of seeds and pollen in plants?