Exam 17: The History of Life

Prokaryotic cells evolved about ________ years ago.

The proposal that certain eukaryotic cell structures may have evolved from a prokaryotic symbiosis is called the:

________ eliminated the need for water for plant reproduction.

Some of the organic molecules on the early Earth came from outer space. True or False?

The modern-day group of vertebrates that bridges the evolutionary gap between land-dwelling and water-dwelling organisms is:

________ may have evolved from aerobic bacteria that were engulfed by predatory prokaryotic cells.

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

All surviving humans belong to the species:

Which of these characteristics separates primates from other mammals?

Current theories hold that hominin species migrated out of Africa:

In addition to Homo, another genus within the hominins is:

Which of the following scientists was part of a pair who first discovered that cellular reactions can be catalyzed by a ribozyme?

The first terrestrial animals were probably:

The earliest upright hominins were in a group called ________.

The first hominin species associated with the use of stone and bone tools was:

An anaerobic prokaryote engulfs a prokaryote capable of using oxygen to produce energy. The anaerobe could now carry on:

Oxygen has a negative influence on the formation of complex organic molecules because it ________.

The earliest multicellular animals in the fossil record are:

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

The oldest fossils of anatomically modern Homo sapiens are ________ years old.