Exam 20: Speciation and Macroevolution

Which theory states that eukaryotic organelles originated as prokaryotes that survived ingestion by a host cell and ultimately evolved mutualistic relationships with the host cell?

Allopatric speciation is often exemplified in which type of geographical area or biome?

Provide at least two types of evidence that support the hypothesis of endosymbiosis.

The iron-sulfur world hypothesis suggests that organic molecules formed near:

Which postzygotic barrier do mules illustrate?

Evidence shows that the earliest life may have existed how long ago?

The occurrence of an RNA world early in the history of life can never be proven, but experiments with _____ have shown that it is feasible.

Which statement about dinosaurs is FALSE?

What was the dominant life form of the Mesozoic era?

Having legs longer than your arms is an example of:

The Holocene epoch marks the appearance of:

Figure 21-2 What is the animal in the accompanying figure?

Taxonomists tend to use the ____ to characterize species for classification.

Gradualism is rarely observed in the fossil record because:

Describe the distinguishing organisms and major biological events associated with the following geological time units. A. Precambrian time B. Paleozoic era C. Mesozoic era D. Cenozoic era

What are considered to be the two most important factors that have been involved in past mass extinctions?

Describe how continental drift resulting in Australia being isolated in the South Pacific contributed to biological species evolution.

The atmosphere of early Earth is currently thought to have contained:

Which are assemblages of abiotically produced polymers?

What type of organism possesses multiple sets of chromosomes from different species?