They are so unique because they have very strange methods of survival.
Example: When they get to cold they go into automatic hivernation, chamelions can change colours, blue tongue lizards have blue tonques, a few can run on hind legs, the horned lizard has spikes, the frilled neck lizard can stretch out a stretchy like mane to make it self look dangerous.
Reptiles do have spinal columns that's what makes the vertebra flexible.
No. The uterus is a body part unique to mammals.
The biggest difference between reptiles and mammals is that reptiles lay eggs, and mammals do not.
because there special
Well, reptiles have scales, they eat meat, and all are in the same species, 3 things different are some reptiles constrict their prey, others chew and swallow, last is not all reptiles can swim. ALL REPTILES ARE UNIQUE.
because birds and reptiles are reptiles and humans are mamals which makes use different! And birds are oviparous
Are apples like apples? This question makes no sense
The question makes no sense.
There is nothing that makes any individual unique.
Reptiles are cold blooded whilst mammals are warm blooded. Mammals have also developed fur.
No, penguins are not reptiles. They are actually birds, belonging to the group of flightless birds classified as Spheniscidae. Penguins are known for their distinctive black and white coloration and their unique adaptation to aquatic life.
Turtles ARE reptiles, which makes this question hard to interpret. They are not as good climbers as Lizards, and can't get through narrow openings as snakes, which I suppose makes them easier to keep confined.