Answer:
Mammals give live birth to their offspring. Reptiles and amphibians lay eggs. Mammals are also usually warm blooded while reptiles and amphibians are cold blooded. Most amphibians and reptiles abandon their young at a certain age while most mammals will take care of their offspring forever.
Explanation:
:)
Answer:
I hope and this result Will serve you
Nucleotides. They are the building blocks of DNA.
It could be a common ancestry among organisms.
I am pretty sure Osmosis sorry if Im wrong
