Tree thinking quiz II
D

Tree thinking quiz II
D - Tree...

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Tree thinking quiz IID. A. Baum, S. D. Smith, and S. D. Donovan Each question in this quiz is built around a Science paper that depicted a phylogenetic tree. It should not be necessary to consult the original article to answer the questions. S. Mathews, M. J. Donoghue. The root of angiosperm phylogeny inferred from duplicate phytochrome genes. Science 286, 947 (1999). 1) The figure above shows the phylogeny estimated for a sample of flowering plants (angiosperms) from PHYTOCHROME A and PHYTOCHROME C, a pair of genes that duplicated prior to the origin of the angiosperms. Which of the following sets of taxa constitute a clade (=monophyletic group) on one gene tree but not on the other? a) Degeneria-Magnolia-Eupomatiab) All angiosperms except Amborellac) Austrobaileya-Nymphaea-Cabombaceae d) Nelumbo-Trochodendron-Aquilegia
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J. X. Becerra. Insects on plants: macroevolutionary chemical trends in host use. Science 276, 253 (1997). 2) The dendrogram on the left clusters plant species by chemical similarity; each of the four main chemical groups is indicated with a different color. This tree does not depict descent relationships, just degree of chemical similarity. On the right, the evolution of these chemical types is reconstructed on a phylogeny of the plants (this does depict inferred evolutionary relationships). The colors correspond to the chemical groups on the left, and the gray branches indicate uncertainty in character reconstruction. What does a comparison of these two figures tell us about the evolution of plant secondary chemistry? . a) The four groups of chemically similar species each constitutes a distinct evolutionary lineage . b) The group colored “black” has the most advanced chemical defenses . c) The red (3) and blue (1) chemical groups are most distantly related . d) The chemical groups have each been gained and/or lost multiple times in evolution
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F. Bossuyt, M. C. Milinkovitch. Amphibians as indicators of early tertiary "out-of- India" dispersal of vertebrates. Science 292, 93 (2001). 3) This tree depicts inferred relationships among some major frog groups with
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Tree thinking quiz II
D - Tree...

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