Question

WHILE VERTEBRATES HAVE NOTOCHORD ONLY AT EBRYONIC STAGE HOW COME CHONDRICHTHYES BE VERTRBRATE WITH PERSISTENT NOTOCHORD THROUGHOUT LIFE

Answer 1

Answer:

animals have notochord called chordates and those without notochord called nonchordes

Explanation:

vertebrata is a subphylum of chordata and chondrichthyes is a class of vertebrata