Looking for classes? Ksquare Career Institute, Bengaluru →
In which of the following notochord is present in embryonic stage : -
A
All chordates
B
Some chordates
C
Vertebrates
D
Non chordates
Detailed Solution
The notochord is a flexible, rod-like supporting structure on the dorsal side, between the gut and the nerve cord.
It is one of the fundamental characters of phylum Chordata, and it is present in all chordates at least at the embryonic stage.
In urochordates it is present only in the larval tail; in cephalochordates it persists throughout life; in vertebrates it is replaced by the vertebral column in the adult.
Non-chordates never have a notochord.
So the notochord is present at the embryonic stage in all chordates.
It is one of the fundamental characters of phylum Chordata, and it is present in all chordates at least at the embryonic stage.
In urochordates it is present only in the larval tail; in cephalochordates it persists throughout life; in vertebrates it is replaced by the vertebral column in the adult.
Non-chordates never have a notochord.
So the notochord is present at the embryonic stage in all chordates.