Question

What are similarities between Reptilia and Prototheria

Answer 1

You must have studied about the mammal that lays eggs in high school.

The duck billed platypus.

It is the connective link between reptiles and mammals.

It has reptilian features, such as it lays eggs.

And it also has mammalian features, such as suckling its young ones.

Monotremes [platypus] and prototherians [echidna, ant eaters] are not considered true mammals, because they do not have a true placenta, which is exclusive to eutherians [cats, dogs, humans etc]. Marsupials [kangaroos] are not considered true mammals either.

I'll not delve deeper into the details of the evolution of reptiles to mammals because that's beyond the scope of the question.

Answer 2

I hope help you
Birds have beaks and talons while reptiles have either sharp teeth, claws and /or none at all. These are the most notable and common differences/ similarities in traits. both are vertebrates having dosel notochord ,breath through lungs,lay eggs(oviparus), and birdshave some alike features of reptiles.
please mark brain list ♥♥♥♥♥♥♥♥♥