the structure of the forelimb of a bird is similar in structure to that of the forelimb of a mammal suggesting that both desceded from a common ancestor this similarity is an example of a. vestigial b. biochemicial c. anatomical evidence that supports the theory of evolution
Which do you think is the correct answer?
biochemical
How do forelimbs fit in a biochemical category?
I suggest you find the definitions of all unfamiliar words in this question and possible answers.
vestigial
http://dictionary.reference.com/browse/vestige
http://dictionary.reference.com/browse/anatomy
The similarity in the structure of the forelimb of a bird and a mammal, suggesting that both descended from a common ancestor, is an example of anatomical evidence that supports the theory of evolution. To understand this evidence, we need to look at both the similarities and differences in the forelimb structure.
To determine if two structures are similar, we can compare their bone arrangements. In both birds and mammals, the forelimb consists of an upper arm bone (humerus), two lower arm bones (radius and ulna), and multiple bones in the hand or paw. Despite the different purposes, such as flying and grasping, the underlying bone structure is analogous.
This similarity suggests that these forelimbs were inherited from a common ancestor. Over time, as the ancestors of birds and mammals diversified and adapted different lifestyles, natural selection acted upon these structures, causing modifications. Despite these modifications, the basic blueprint of the forelimb remains similar.
This type of anatomical evidence helps support the theory of evolution because it suggests that birds and mammals share a common ancestry. It indicates that species have evolved and diversified over time from a common ancestor through the process of descent with modification.
Therefore, the correct answer is c. anatomical evidence that supports the theory of evolution.