Question

Advanced characters of vertebrates over protochordates​

Answer 1

Answer:

refer your ncert textbook

Answer 2

Answer:

* The notochord is either replaced entirely by the vertebral column or is present  along with the vertebral column.

*The heart is divided into chambers and has RBC in the blood .

*Each vertebra has a distnict sex . The only exception is in the case of some fish.

*When fertilisation takes place the sperm and the ovum in the animal pole pathway.

Explanation:

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