What are dual-purpose chickens and why are they not economically viable?

1. poor quality meat

               2. genetic variations

               3. do not lay as much as their regular chicken counterparts

 hope this helped!

the correct answer for this question is:

it is system invented in 1872 that produced the first illusion of movement. basically it was a disk with a series of drawings around the edge, showing the same object in slightly different poses. when it was spun, it created the illusion of movement.

found this online : )

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