You'll typically find the abstract at the top of the beginning of the article. The abstract summarizes the articles, its purpose and conclusions.
In this article excerpt, you can see scientific names for species like "paralytic shellfish" and "dinoflagellates of the genus Alexandrium."
You will typically find a full list of references at the end of the article.
This is a screenshot of the about section of the Journal of Plankton Research, which states that the journal is peer-reviewed.
These are just a few examples of common popular resources.
Here is an example of how the New York Times transparently explains their editorial standards and how the organization ensures it's adhering to those standards.
In this example from a New Yorker article, the author is drawing a connection between fences and other property borders to class divides.
You will often be asked to find scholarly, peer-reviewed sources for your assignments. What does this mean?
When we talk about popular resources, we don't mean which table they sit at in the cafeteria, but that they are meant for a popular audience aka the general public.