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If the cells did not specialize than there would be no chick developing.
This space is the reserve air that a developing chick will use just before hatching. As the chick peeps the inner membrane of the shell on day 21, that small amount of air will sustain it until it can open a hole in the outer membrane and hard shell.
This is not possible. For the chick to break the shell, it must first break the membrane.
Chick Chick Boom happened in 2007.
A developing chick nourishes itself inside the eggshell through the egg yolk. This is the chicks source of food.
The developing chick feeds on the yolk sac, much like the baby of live bearing animals attaches to the placenta. The chick has enough nutrients when born to got 24 hours without beginning on chick starter.
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The developing chick feeds on the yolk sac, much like the baby of live bearing animals attaches to the placenta. The chick has enough nutrients when born to got 24 hours without beginning on chick starter.
When a bird's egg is fertilized, a chick is developing inside.
in the book when did it happen? and where did it happen?
to protect the developing chick and hold it as an incubator
so that the chick can get oxygen while its developing