How Did Grayson and Wilbur (2009) Examine Factors That Affect

question 6

Multiple Choice

How did Grayson and Wilbur (2009) examine factors that affect migratory movement in newts?

• A) They manipulated food abundance in different patches.
• B) They observed variation in migratory behavior in different populations.
• C) They manipulated the density and sex ratio in experimental plots.
• D) They characterized differences between resident and migratory individuals.
• E) They examined hormone levels of resident and migratory individuals.

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