The paradox of all paradoxes. Id have to say the chicken. This is my reasoning for the answer: You need a chicken (or any other egg laying animal) to have a egg. Lets just say that the egg was first and it came from a single cell. How would that egg have incubated itself? Lets asume the surounding tempurature was just right for the egg to be incubated; but how would the chickling be able to take care of itself or feed itself to survive? An egg must rely on another of its kind for survival just as any other species does.