VERY INTERNAL
external
internal
The 2 fertilisation's are external fertilisation, or internal fertilisation. External fertilisation is the type frogs do.
internal is in and external is out fertilisation
internal
i think internal
internal
Yes
Reptiles and birds are among the major groups of vertebrates that have internal fertilization and external development. Also included are monotremes and marsupials.
arthropods usually have external fertilization
Yes.
dogs have internal fertilisation which means that thier babies grow inside of them and they do not lay eggs