Shell layer adjoining the outer shell membranes, formed by conical structures; forms about one‑third of the shell thickness.
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Shell layer adjoining the outer shell membranes, formed by conical structures; forms about one‑third of the shell thickness.
The amount of nutrients required to keep an animal in nutrient balance.
System whose function is production of semen and its introduction into the femal...
A symmetrically rounded prominence of the cloacal mucosa located between two dis...
Embryo positions before hatching that differ from the normal longitudinal positi...
Contagious viral disease manifested clinically by paralysis, changes in pupil sh...
Number of hens per one male in a breeding flock.