The beak in birds is toothed in

Differentiate between Invertebrates and Vertebrates.

Assertion: Notochord is a mesodermally derived rod-like structure formed on the dorsal side during embryonic development of chordates.
Reason: Notochord is replaced by the vertebral column in the adult vertebrate.

One of the primary characteristics of chordates is:

Write the characteristics of animals that possess a notochord throughout their life.

In which of the following is a closed circulatory system found?