By transferring neural crest cells from a duck to a quail and vice versa, Schneider and Helms demonstrated that:
a. neural crest cells influence the development of beaks.
b. beaks influence fitness traits.
c. homeobox genes are conserved across species.
d. gene duplication causes a difference in beak shape.
A
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In criticizing ecosystem management, one of your classmates says that it is arrogant for us to think that we can manage nature. You respond that you think she probably has a(n) ______________ worldview.
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__________ is a set of methods that allow us to
reconstruct phylogeny. Fill in the blank(s) with the appropriate word(s).
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