Exam 23: Understanding Diversity: Systematics

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The similarity between the bodies of sharks and dolphins is an example of convergent evolution.

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Membership in a clade cannot be established by shared ancestral traits alone. _____________________

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MATCHING Choose the best match for the definiton. a.arranging organisms into groups based on similarities that show evolutionary relationshops d.evolutionary ancestor of a group of organisms from a common ancestor b.the scientific study of the diversity of organisms and their evolutionary relationships e.group of organisms with a common ancestor c.the science of naming, describing and classifying organisms -Describe the significance and relationship of the genus and species taxons.If there were not humans on earth to classify organisms, would species still exist?

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The evolutionary history of a group of organisms from a common ancestor is termed:

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Which classification level would be the most inclusive?

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Which classification level would be the least inclusive?

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Shared ancestral characters may also be called:

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Humans depend on other organisms to provide all of the following except:

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Dolphins share synapomorphies with dolphins. _____________________

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The original two Kingdoms that were established to organize living organisms were:

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Which taxon has been assigned to a number of "supergroups" ?

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Figure 23-2 Use the figure to answer the corresponding question(s). Figure 23-2 Use the figure to answer the corresponding question(s).   -In Figure 23-2, the pair of organisms that have the most recent ancestor is: -In Figure 23-2, the pair of organisms that have the most recent ancestor is:

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The number of similarities in certain DNA or RNA nucleotide or amino acid sequences may be used as a molecular clock to indicate how much time has passed since the groups branched from a common ancestor. __________________

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Figure 23-2 Use the figure to answer the corresponding question(s). Figure 23-2 Use the figure to answer the corresponding question(s).   -In Figure 23-2, the taxon labeled II is: -In Figure 23-2, the taxon labeled II is:

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When faced with multiple possible cladograms, the criteria of __________ is employed.

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Contrast the following terms: monophyletic, paraphyletic, and polyphyletic.Provide one example for each.

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A taxon that diverges earlier than the other taxa being considered in cladistic analysis is:

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Some biologists are considering adopting a different classification scheme based on common ancestors called:

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The scientific study of the diversity of organisms and the evolutionary relationships between them is referred to as:

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In 1969 RH Whittaker proposed a 5 kingdom classification based mainly on?

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