yes they can as long as they are not more than 1 week out of date
Yes. Chicks come from fertilized and incubated eggs.
Yes, like all birds, the eggs must be incubated to hatch.
The eggs would no longer be incubated and protected by the mother, resulting in their death
There's a terminology problem here. Birds, including blue jays, lay eggs. The eggs are then incubated until the young birds hatch from them. If you consider "hatching" to be the same as "being born", then no, the incubation has already taken place. If you consider "born" to correspond more to the egg laying part, then yes, the eggs are incubated after being laid.
78-83f
The complete set of eggs produced or incubated at one time.
If eggs are to be incubated for hatch, they must be fertilized. That is where the rooster comes in.
Hens ovulate daily: their eggs. If their eggs are fertile there is a chance of them hatching into chicks, if incubated correctly.
A group of emu eggs that is being incubated by a male emu is called a "clutch".
Falcons are birds, so they hatch from incubated eggs.
The egg is not a chicken unless it has been fertilized and incubated.
Fertilised platypus eggs stay in the mother's body for around 28 days. The egg is incubated by the mother curling around it and keeping it warm and dry in the chamber of the burrow for another 10 days.