Which statement about white bands around eggs is true?

Which statement about white bands around eggs is true?

• A. A white band forms around eggs several days after hatching.
• B. A white band forms before laying.
• C. A white band forms during incubation.
• D. White bands never form.

Answer: (A)

The sign being described appears after the egg has hatched, reflecting a post-hatch change in the egg’s outer layers. When a chick emerges, the shell and surrounding membranes undergo drying and rearrangement, which can leave a light, chalky ring or band around the egg’s circumference days after hatch. This indicates a process tied to hatch and subsequent drying, not something that would be visible before laying or during incubation. Therefore, the statement that white bands form several days after hatching best matches what is observed. The other options describe formation before laying, during incubation, or never forming, which don’t align with this post-hatch change.

The sign being described appears after the egg has hatched, reflecting a post-hatch change in the egg’s outer layers. When a chick emerges, the shell and surrounding membranes undergo drying and rearrangement, which can leave a light, chalky ring or band around the egg’s circumference days after hatch. This indicates a process tied to hatch and subsequent drying, not something that would be visible before laying or during incubation. Therefore, the statement that white bands form several days after hatching best matches what is observed. The other options describe formation before laying, during incubation, or never forming, which don’t align with this post-hatch change.