Cat clavicle

Cats have clavicles, but they serve no function to the animal. "The clavicle, or collarbone, is much reduced in size. It does not connect with other bones but is buried in the muscles of the shoulder region" (feline 1). The lack of a functional clavicle allows cats to squeeze through tight spaces. The fact that cats have nonfunctional clavicle bones suggests that an ancestor of cats had clavicle bones that were probably functional. The ancestor passed down the trait to have clavicle bones to cats, but over time, the necessity of the clavicle bones for cats became obsolete. Thus the bones became buried in the muscle and became functionless. This trait can be explained by homology because there is no apparent function for the clavicle in cats. Therefore The Only Reason cats have nonfunctional clavicles was because the skeletal structure was passed down from an ancestor. This in turn argues the existence of evolution.

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