Which of the following descriptions correctly reflects the relationship between natural selection and animal mouthparts?

+1 vote

 

Animal mouthparts have improved over evolutionary time, becoming more complex and sophisticated.

Adaptation in mouthparts has eliminated imperfect structures in human mouths and favored structures that enhance fitness.

Animal mouthparts are believed to have evolved randomly over time, as they are not directly related to fitness.

The evolution of diverse tooth shapes has allowed mammals to depend on a variety rather than a few food sources.

 

asked Dec 31, 2012 in Biology by anonymous
    

1 Answer

+1 vote

 

The evolution of diverse tooth shapes has allowed mammals to depend on a variety rather than a few food sources.

 

answered Dec 31, 2012 by CaptainTeemo ~Expert~ (631 points)

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