They don't.
Hence the hard crunchy shell on the outside with the soft center - like M&Ms.
The vertebrate group in which humans belong to is the mammal group.Humans belong to the Mammal group.
They belong to the group of arachnids.
Possums belong to the group of vertebrates known as mammals.Specifically, they are marsupials.
aracinaids
birds
mammals
what is the vertabrate group of a walrus
They are qualified as invertebrates and belong to the group of arthropods or crustaceans
reptile
yes
fish
IT IS A REPTILE