Pay close attention to the sequence of the digestive system; exam questions often scramble the order of the Crop, Proventriculus, and Gizzard.
Remember that green and blue lights are positive for broiler weight gain, but red light is negative for broiler weight gain.
Do not confuse the light colors for laying hens: red and white light increase egg production and ovary development, while blue light causes the highest mortality.
Differentiate between the functions of pneumatic bones (respiratory system connection) and medullary bones (calcium source).
Note that chickens do not have external ears; they only have ear openings and specialized earlobes which can be red or white.
Remember that while red and white lights stimulate sexual maturity in roosters, blue light is the one that increases blood testosterone levels.
