17. It is stiff rod of special cells surrounded by connective tissue present in the mid-dorsal region and appears in the embryos of all chordates. A.Placenta B.Notochord C.Cranianta D.Ligule
Answer: Option B Solution: Notochord is stiff rod of special cells surrounded by connective tissue present in the mid-dorsal region and appears in the embryos of all chordates.
