A Scientist Has Studied the Bone Structure of a Gopher

Multiple Choice

A scientist has studied the bone structure of a gopher snake. She drew this diagram (refer to the figure below) and has asked for you to determine the cause of the pelvis and femur bones.

A) These are evolutionary changes that the snake is going through so it can walk on land in the next few generations.
B) These are phenotypes just like the eyes or tail of the snake.
C) The scientist must have made a mistake and drew an image of the wrong organism as snakes cannot have legs.
D) These are vestigial structures left over from a common ancestor who had legs.
E) These are traits due to selective breeding.