Suppose Individual Robins with Longer Beaks Have Somewhat More Offspring

question 142

Multiple Choice

Suppose individual robins with longer beaks have somewhat more offspring than those with shorter beaks and this has led to increases in beak length over time.We can say that beak size is associated with the _______ of the robin and that there is _______ selection operating on beak size.

• A) fitness; stabilizing
• B) fitness; directional
• C) genetic structure; stabilizing
• D) genetic structure; directional
• E) genetic structure; disruptive

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