animal kingdom Questions

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A): All vertebrates are chordates but all chordates are not vertebrates.Reason (R): Notochord is replaced by the vertebral column in the adult vertebrates.In the light of the above statements, choose the correct answer from the options given below:

Nitrogenous waste is excreted in the form of pellet or paste by:

Exoskeleton of arthropods is composed of:

In which of the following animals, does the digestive tract have additional chambers like crop and gizzard?