No, planarians cannot fertilize their own eggs. Although they possess both male and female reproductive organs, the eggs must be fertilized by the sperm of another planarian.
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.
they enter eggs and fertilize them and then YOU are created.
Amphibians fertilize their eggs externally.
Planarians usually hatch from eggs, typically inside a host. They are able to regenerate, even when they are cut entirely in half. Some use this to reproduce asexually, while other species engage in sexual reproduction.