Source: Diamond, Jared. Guns, Germs, and Steel: The Fate of Human Societies. New York and London: W. W. Norton & Co., 1999. 159.

"The ways in which domesticated animals have diverged from their wild ancestors include the following. Many species changed in size: cows, pigs, and sheep became smaller under domestication, while guinea pigs became larger."

Student Writing Sample 1: Domesticated animals diverged from their wild ancestors in numerous ways. Animals such as cows became smaller, while animals such as guinea pigs became larger.

Plagiarism or not?  Why?

Student Writing Sample 2: A careful examination of the ways in which domesticated animals have diverged from their wild ancestors shows that cows, pigs, and sheep became smaller under domestication, while guinea pigs became larger.

Plagiarism or not? Why?

Student Writing Sample 3: As man domesticated wild animals, many underwent changes. Guinea pigs got bigger than their wild cousins, but cows, pigs, and sheep became smaller (Diamond 159).

Plagiarism or not? Why?