Chapter 10 The Origin and Diversification of Life on Earth
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Chapter 10
The Origin and Diversification of Life on Earth
Figure 10-13 Speciation without geographic isolation
Although there are many instances of sympatric speciation through polyploidy in plants, why do you think it is quite rare in animals? Recall the discussion of trisomy in Chapter 6.
Figure 10-14 Mapping common ancestors
What feature of the phylogenetic tree in Figure 10-14 indicates that the mouse is more closely related to the rat than to the human? What feature indicates that the human is more closely related to the mouse than to the bird? Are birds more closely related to fish or to mice?
Figure 10-15 A growing tree
Assume that the tree of life in Figure 10-15 accurately reflects the actual relationships among these groups of organisms and critique scientists’ earlier assignment of the fungi to the plant kingdom back in the days when there were only two kingdoms: Animalia and Plantae.
Figure 10-28 From self-replicating metabolizing cells to complex organisms
This phylogenetic tree seems to be distinctly at odds with older classifications that placed Bacteria and Archaea in the same kingdom, Monera. What features of bacteria and archaeans justify lumping them together?
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