Exam 18: The History of Life

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

If the Cretaceous mass extinction had not occurred, which group of animals would probably include the largest land animals today?

Theories on the atmosphere of early Earth indicate that it lacked

The scientific name for Neanderthals is

Continental drift is caused by

Who is credited with proposing that prebiotic chemical conditions could lead to the evolution of complex molecules and, eventually, to living organisms?

In addition to Homo, another genus within the hominins is

Which of the following processes involves behaviors that are acquired by learning and can be modified and passed on from one generation to the next?

Reptiles evolved scaly body coverings as a means for

-Based on the graph, if 35% of the original 40K remains in a sample of basalt, what is the approximate age of the rock?

The oldest fossil organisms presently known have been dated at approximately how many years old?

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

Modern invertebrates first appear in the fossil record during the

According the pictured phylogenetic tree, the common ancestor for all Homo species is

-Based on the graph, if 60% of the original 40K remains in a sample of basalt, what is the approximate age of the rock?

The fossil record indicates that about 600 million years ago, a wide variety of__________animals had evolved in the oceans.

Which group of vertebrates was the first to evolve a waterproof egg, which allowed the group to move away from water, deeper onto dry land?

Probably the greatest advantage for the original multicellular organisms was their ability to

What is the significance of upright walking?

Miller and Ureyʹs experiments to simulate prebiotic evolution produced