Which vertebrate classes lay eggs ?

In what form the terrestrial reptiles excrete their nitrogenous wastes? How is this kind of excretion advantageous to terrestrial vertebrates which lay shelled eggs?

Which class of vertebrates possesses dry and cornified skin with epidermal scales or scutes?

Which class of vertebrates includes viviparous forms?

Female Anopheles lays eggs in

Name the classes in which living vertebrates have been grouped.

Butterflies , moth & honey bees & beetle lay eggs of which type