In crossbill birds the beaks have a specialized shape to allow the crossbills to extract pine seeds out of cones. Crossbills in one forest feed on two different pine species. For one kind of cone a long thin beak is most efficient while in the other type of cone a short thick beak is most efficient. What evolutionary force is likely happening on beak shape?
a. disruptive selection
b. genetic drift
c. gene flow
d. intrasexual selection
e. frequency dependent selection
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Genetic Variation concept. You can view video lessons to learn Genetic Variation. Or if you need more Genetic Variation practice, you can also practice Genetic Variation practice problems.
What is the difficulty of this problem?
Our tutors rated the difficulty ofIn crossbill birds the beaks have a specialized shape to all...as medium difficulty.
How long does this problem take to solve?
Our expert Biology tutor, Kaitlyn took 3 minutes and 16 seconds to solve this problem. You can follow their steps in the video explanation above.