Question
Biology Question on earthworm
The segments of earthworms are
A
Apparent in the embryo but not in the adult
B
Specialised for different functions and are present in endoderm only
C
Present in mesoderm but not in the ectoderm
D
Repetitive, with serial repetition of at least some organs
Answer
Repetitive, with serial repetition of at least some organs
Explanation
Solution
Annelids are first to evolve true metameric segmentation. They are present in embryo as well as in adults. They are present both in ectoderm as well as in mesoderm and are repetitive.