Use the principle of parsimony and molecular genetic data to choose a phylogenetic tree for your hypothesis of how the extant species were derived from the ancestor. 
A. Tree 1 requires the fewest mutations, making it the best choice.
B. Tree 1 requires the most mutations, making it the best choice.
C. Tree 2 requires the most mutations, making it the best choice.
D. Both trees are equally good because sequences A, B, C, and D are the same in both.
E. Tree 2 requires the fewest mutations, making it the best choice.
Answer: E
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The arrangement of photosystems I and II in the thylakoid membrane is exactly like drawn in the Zpathway
of most textbooks.
Indicate whether the statement is true or false.Bacterial ribosomes differ from eukaryotic ribosomes in all of the following except
A. they differ in RNA content. B. they are smaller than in eukaryotes. C. they act as sites of protein synthesis. D. they differ in ribosomal proteins. E. tetracycline and chloramphenicol can bind to bacterial ribosomes.
In healthy adults, a loss of more than ____% of total body fluid is required to alter homeostasis and cause illness.
A) 10 B) 15 C) 20 D) 30
You are instructed to add 2.0ml of your original sample to 2.0ml of diluent. What is your dilution?
What will be an ideal response?