Exam 16: Evolution on a Large Scale

The fossils of a new species of reptile are found in deposits dating to the Permian period. Later, scientists discover that fossils of the species changed somewhat over time, and can be found in deposits dating from the Permian period all the way up to the Cretaceous period. The fossils vary from one continent to another, but many seemingly intermediate forms are found, and the fossils are spread over most continents. The scientists' observations most strongly support which evolutionary models?

All of the following are criteria by which a species may be defined except

Cladograms show the sequence of evolution of characters in a clade.

Which of the following statements is true about the previous cladogram and the characters used to derive it?

Evolutionary relationships between organisms are determined by

Which of the following is not part of the punctuated equilibrium model?

Linnaean classification sometimes does not reconcile with cladistics because

Three species that arose as a result of adaptive radiation are organized on a cladogram. On this cladogram, two of the species would likely share several characters not present in the third.

Which of the following is an example of sympatric speciation?

A phylogenetic tree

Which of the following correctly reflects the division of the history of life on Earth, from most inclusive to least inclusive?

The pollen from a red maple is unable to fertilize the eggs from a sugar maple. This is an example of what type of isolating mechanism?

Use of chemical signals in mate recognition is a type of postzygotic isolating mechanism.

Which of the following is not a prezygotic isolating mechanism for two species found in the same geographical location?

Which of the following lists the levels of taxonomic classification in order from the most inclusive to the least inclusive?

Similarities due to convergent evolution are called __________.

Shared derived traits are found in all members of the ingroup of a clade.

Which of the following would be considered a separate species as defined by the biological species concept?

Figure: -In the figure shown here, the letter W represents which of the following?

Figure: -In the figure shown here, which of the following organisms would have the same shared derived trait?