Place the steps for cloning the horse in the correct order. 1) cloned horse born. 2) collect tissue from dead horse. 3) remove nucleus from dead horse skin cell. 4) x-ray donor egg to destroy nucleus. 5) impregnate surrogate mare with modified egg. 6) implant desired nucleus into donor egg. 7) collect donor egg from surrogate mother horse. a) 2, 3, 7, 4, 6, 5, 1 b) 2, 5, 7, 4, 3, 6, 1 c) 7, 4, 2, 3, 6, 5, 1 d) 7, 2, 4, 3, 6, 5, 1