If you think of the earthworm body plan as a drinking straw within a pipe, where would you expect to find most of the tissues that developed from endoderm?
A) lining the straw
B) lining the space between the pipe and the straw
C) forming the outside of the pipe
D) forming the outside of the straw

Question

Quizplus · Accepted Answer

Endoderm gives rise to the inner lining of the digestive tract, respiratory tract, and associated organs. In the earthworm, the body plan is like a straw, the digestive tract would be the inner lining of the straw, therefore, most of the tissues that developed from endoderm in earthworms would be expected to line the straw.

If You Think of the Earthworm Body Plan as a Drinking