#Question id: 8715
#Unit 9. Diversity of Life Forms
Which of the following items is most likely to form a simple linear relationship with the number of gene-duplication events, when placed as the label on the vertical axis of the following graph?
#Question id: 8716
#Unit 9. Diversity of Life Forms
The most important feature that permits a gene to act as a molecular clock is ________.
#Question id: 8717
#Unit 9. Diversity of Life Forms
Molecular clocks are more reliable when ________.
#Question id: 8718
#Unit 9. Diversity of Life Forms
Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?
#Question id: 8720
#Unit 9. Diversity of Life Forms
The question refers to the following table, which compares the percent sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (for example, Intron I is the one closest to the promoter). The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A.
Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock?
#Question id: 8721
#Unit 9. Diversity of Life Forms
Based on cladistics, which eukaryotic kingdom is polyphyletic and, therefore, unacceptable?