Class reptilia and class amphibia share many traits, give at least 3 similarities between these 2 classes

Reptiles and amphibians share many traits which shows that they shared a common ancestor in the past. Some of the traits that are similar in reptilia and amphibia are:

1. Both are ectoderms: Reptiles and amphibians are cold-blooded animals and they can not regulate their body temperature on their own so they take heat from surrounding to warm their body and become active.

2. Both have four legs: Both reptile and amphibians have four legs for locomotion except some animals their group.

3. Both are vertebrates: Reptiles and amphibians have vertebral column, therefore, they both come under vertebrates.

The five classes of vertebrate are Pisces, amphibians, reptiles, birds and mammals. These all classes share some similar characteristics with each other.

The amphibians and reptiles share common characteristics with each other. Both amphibia and reptiles are ectotherms, they cannot maintain their internal body temperature depends on the external environment. The another similarity is most of them (not all) are insectivorous and omnivorous. Most repltiles and eggs lays eggs and young one develop inside the egg.