Yes
dogs have internal fertilisation which means that thier babies grow inside of them and they do not lay eggs
yes,sometimes
if you mean eggs you buy in a store, then no, because these eggs were conceived by the bird without male fertilisation.
Because - external fertilisation is 'left to chance'. There's no guarantee that every egg laid will be fertilised by sperm. Internal fertilisation is much more successful.
In humans and mice fertilisation is internal and the chance of fertilisation is more.But in frogs and those which lay eggs externally,the chance of fertilisation is less since they are prone to destruction.Inorder for their survival,they lay more no. of eggs than needed
There has not been any huge advantage but they can produce a number of the eggs.
They lay eggs just the same, but they wont hatch.
It is when an egg is fertilized outside the bodies of the ones reproducing. So the eggs are fertilized after they are laid.
I've never heard of a spider with hard eggs. I always heard they were soft.
it can have 1000 eggs the jewel spider
Yes. It takes a male and a female spider for the female spider to lay eggs. The male spider wraps his semen inside a ball of spider silk and deposits that inside the female. The female spider usually surrounds her eggs in a cocoon made of spider silk.