No they don't.
yes they do
Yes, because sponges are hermaphrodites
If no roaster one hen will start to fertilize the eggs.
fertilize egg
Yes. As with all birds a male is needed to fertilize the eggs.
They fertilize other's eggs, rather than their eggs because they really really SUCK !!
Most tapeworms have both male and female reproductive organs to reproduce and fertilize there own eggs.
Uterus.
Planarians undergo asexual reproduction through fission, where they split into two separate individuals. They can also reproduce sexually by exchanging genetic material with another planarian. After mating, the fertilized eggs develop into larvae that eventually grow into adult planarians.
Amphibians fertilize their eggs externally.
they enter eggs and fertilize them and then YOU are created.