arthropods usually have external fertilization
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
VERY INTERNAL
i think internal
internal
Yes
dogs have internal fertilisation which means that thier babies grow inside of them and they do not lay eggs
Yes.
internal. the male needs to 'mate'with the female