internal
internal
they use external fertilization.
No external fertilization is not present in the common house fly. House flies reproduce via sexual reproduction and internal fertilization.
external sexual
Nope - they reproduce by internal fertilization.
Internal. Dogs mate through copulation and internal fertilisation, like all mammals (including humans).
Adult jellyfish reproduce externally by releasing sperm and eggs into the water. When jellyfish are in the polyp stage, they can reproduce asexually by cloning themselves.
Stingrays reproduce using internal fertilization. They are known to give life birth in the ocean to many infant stingrays at a time.
they have external fertilization , PS i learned it in science :P zz this is all wrong...it does NOT use exernal fertilization...external fertilazation is for fish and stuf,but internal is for humans and mamals.
All birds fertilize their eggs internally. A male bird has to mate with a female in order for a fertilized egg to be produced.
Butterflies reproduce by internal fertilization and not by external fertilization. Butterflies, like most insects, will then lay the eggs and wait for them to hatch.