I don't think there is scientific explanation for that. What I know is that that is a question for God not humans since it is He who makes all happen.
the chicks will be many
You do not need a cock to get an egg from a chicken. If you want to have fertilized eggs that will hatch into chicks there has to be a cock.
No The hen has no idea which eggs are fertile or not. Once the chicks hatch the broody hen will roll out the bad eggs to clean the nest and make room for the chicks to stay warm and safe.
They lay eggs daily, but if you want chicks you have to have a male to fertilize the eggs.
you hatch eggs to grow the chicks into chickens for their meat and eggs to eat
A peregrine falcon is a bird of prey, and the chicks do hatch from eggs.
Penguin chicks hatch from eggs.
Quail eggs can be placed under a broody chicken.Quail eggs can take between 17 and 25 days to peep (hatch) depending on the breed.Remove newly hatched chicks from the chicken brood ASAP after hatch and raise separately in a brooder box
The chicken egg will likely hatch first. Quail eggs hatch in 21 to 23 days. Chicken eggs hatch in 21.
A peregrine falcon is a bird of prey, and the chicks do hatch from eggs.
Pigeon chicks hatch from eggs.
Macaws are birds, they do not have babies, they lay eggs and these hatch out into chicks.