Biology · ANIMAL KINGDOM

Select the correct statement regarding the origin and location of the notochord in animals.

1. A
   It is an ectodermally derived flexible rod formed on the ventral side during embryonic development.
2. B
   It is an endodermally derived hollow tube formed on the lateral side of chordates.
3. C
   It is present in non-chordates such as Porifera and Echinodermata throughout their adult life.
4. D
   It is a mesodermally derived rod-like structure formed on the dorsal side during embryonic development in chordates.