Poultry Judging Practice Test

What provides nutrients to an embryo during the incubation period?

1. Albumin

2. Yolk

3. Chorion

4. Amnion

The correct answer is: Yolk

The yolk is the primary source of nutrients for an embryo during the incubation period. It contains proteins, lipids, vitamins, and minerals, all of which are essential for the growth and development of the embryo. As the embryo grows, it relies on the yolk sac's nutrients, which are gradually absorbed to sustain its development until it is ready to hatch. In contrast, albumin also contributes to the embryo's nourishment, but its main role is to provide water and some additional proteins rather than serve as the primary nutrient source. The chorion and amnion serve different functions in embryo development. The chorion helps with gas exchange and protection, whereas the amnion provides a protective fluid-filled sac that cushions the embryo. Therefore, the yolk's function as the main nutrient reservoir makes it the correct answer in this context.