Here is a very interesting website on how an egg is laid.
Pigs do not lay eggs. Being mammals, they produce live young.
Ovaries produce eggs.
Yes, all animals need to reproduce to keep from being extinct. Of course they lay eggs!
No. seahorses are ovoviviparous...meaning they produce eggs but their eggs are in the placenta rather than being outside the body!
Yes. All vertebrates produce eggs.
To increase the chance of it being fertilised
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The ovaries are the female organs that produce eggs.
Eggs with pointed ends produce Roo's eggs with rounded ends produce hens!
No, a chicken needs a rooster to fertilize the egg in order for it to develop into a chick. Without the rooster's contribution, the eggs laid by a hen will remain unfertilized and will not hatch into chicks.
Only two mammals produce eggs, the echidna and the platypus.
Females only produce one or two eggs, males produce many sperm.