He disproportionately high appearance of polydactylism among the amish suggests that a. it is a common mutation

nope its not A (if that what you were trying to say)

He disproportionately high appearance of polyactylism among the Amish suggests that it was over represented in the gene pool of the original Amish settlers.

it is c

Explanation:

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.