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Quiz #1 Biology 2 The following are steps used to construct a cladogram that best reflects the evolutionary relationships of a group of species. Which step involves deciding which tree is most likely to have occurred, based on the fewest character state changes? Answer s: Apply the principle of parsimony. Question 2 Characteristics that have arisen in organisms as a result of common evolutionary descent are said to be ______________ characteristics. Answer s: ancestral Question 3 Infolding of the cellular membrane has led to the development of the Answer s: nuclear envelope Question 4 RNA was probably the first molecule used to encode genetic information; the use of DNA came later. This is due to RNA's inherent stability and its ability to store information more accurately than DNA. Selected Answer: FALSE
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Unformatted text preview: Biology 2 Question 5 A scientist is studying endosymbiosis in cells. This means she is investigating how mitochondria and chloroplasts were derived from prokaryotic cells. Question 6 10 out of 10 points ___________________ are mats of cyanobacterial cells that trap mineral deposits Answer s: Stromatolite Question 7 10 out of 10 points How did humans colonize the New World? Answer s: Early humans walked across a land bridge during periods of lowered sea level. Question 8 The oldest microfossils are of Answer s: prokaryotes. Question 9 Bacteria and archaea are distinct from eukaryotes in that they lack compartmentalization Answe r: True Quiz #1 Biology 2 Question 10 10 out of 10 points _______________ ruled the earth for 1 billion years. Bacteria and Archaea...
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