Evidence of Evolution.. There’s More? Exit Slip

Carefully examine the drawings of the bones. Look for similarities among the various animals. Notice that each part of the human arm is shaded differently. (All of the animals have a humerus that is polka dotted, the ulna is plain white, the radius is striped, etc.)

Are the bones arranged in a similar way (for example in the same order) in each animal? Explain.

Match the function (what does it do?) of each set of bones below:

Fill in the blanks to complete the sentence below:

Homologous structure are​ (a)   in structure, but ​ (b)   in function.

What function do these structures share?

What function do these structures share?

Fill in the blanks to complete the sentence below:

Analogous structures are​ ​ (a)   in structure, but ​ (b)   in function.

Vestigial Structures:

The cave fish and minnow shown to the left are related, but the cave fish is blind. Please answer the questions below.

Assume the two fish came from the same original ancestor. Why might the cave fish have evolved without eyesight?