To apply parsimony to constructing a phylogenetic tree, _____
A) choose the tree that assumes all evolutionary changes are equally probable
B) choose the tree in which the branch points are based on as many shared derived characters as possible
C) choose the tree that represents the fewest evolutionary changes, either in DNA sequences or morphology
D) choose the tree with the fewest branch points
C
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The function of telomeres can be best described as:
A. attachment sites for the proteins of the kinetochore. B. sequences at the ends of the linear eukaryotic chromosome that protect the ends from proteases. C. sequences of the eukaryotic chromosome that ensure proper distribution during mitosis. D. sequences of the bacterial chromosome that ensure proper distribution during binary fission. E. the sites at which replication initiates.
Why do electron microscopes have the ability resolve such small objects?
a. Because electrons have a much shorter wavelength than the photons of visiblelight b. Because electrons have a much longer wavelength than the photons of visiblelight
A heart with three chambers, one atrium, and two ventricles is shared by _____
a. reptiles and mammals b. reptiles and amphibians c. amphibians and mammals d. birds and mammals e. birds and reptiles
How does urban sprawl directly or indirectly affect human health?
A. Traffic and congestion during a long commute increases air pollution. B. More time in the car means less time to exercise (i.e. walk or bike). C. Many children now grow up without the experience of roaming through woods and fields; this is known as Nature Deficit Disorder. D. All of the above are correct. E. Urban sprawl has absolutely no effect on human health. No studies have ever been done to examine this.