Which of the phylogenetic trees above best demonstrates cladogenesis? 
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A. Tree 2
B. Tree 3
C. both Tree 1 and Tree 2
D. Tree 1
E. both Tree 2 and Tree 3
Answer: E
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A microbial population can contain several microbial communities
Indicate whether the statement is true or false.
Suppose a three-point testcross was conducted involving genes X, Y, and Z. If the most abundant classes of progeny are X Y z and x y Z and the rarest classes are x Y Z and X y z, which gene is in the middle?
A) X B) Y C) Z D) cannot be determined
Exergonic reactions
A. occur when ADP binds to inorganic phosphate to form ATP. B. occur during aerobic cellular respiration. C. do not occur in anaerobic cellular respiration. D. include synthesis of large carbohydrates. E. only occur in heterotrophs.
The genomes of closely related species are more similar than distantly related species because _____
a. the less time since the species diverged, the more lethal DNA mutations will accumulate b. the more time since the species diverged, the more neutral DNA mutations will accumulate c. the less time since the species diverged, the more neutral DNA mutations will accumulate d. the more time since the species converged, the fewer adaptive DNA mutations will accumulate e. all organisms will accumulate lethal DNA mutations at the same rate