I'm looking for 2 articles in Biology and I can't determine if they're peer review or not. Can anyone help with what I'm supposed to look for?

Answer 1

I wonder if you mean have been peer reviewed?

All of the articles cited here are peer reviewed by at least two peers. (to download the entire articles, you have to pay).

http://www.nature.com/nature/index.html

Answer 2

Not all journals use the peer review process. Sometimes the article will say that is was peer reviewed. My experience, however, is that most do not. You might go to the web site of the journal itself, look for "how to submit an article" and see if there is information there about peer review. Most major journals do use peer review.