Amino acids that can be synthesized by the organism in sufficient amounts, or that the organism does not require from the diet.
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Amino acids that can be synthesized by the organism in sufficient amounts, or that the organism does not require from the diet.
Symbol for nitrogenous substances.
A genetically determined feathering abnormality that is a breed trait of naked n...
Mode of reproduction using natural mating of males with females.
A lighting regimen determined by natural day length and intensity; used mainly i...
Symbol for net energy.
Nest boxes used for egg laying in poultry houses; may be individual or group des...