Writing a scientific paper requires credible sources. Science does not show bias, but humans tend to show bias. There are sites and articles that provide facts without proper scientific evidence. Avoid taking information from them. You must be able to identify reliable sites so the data in your presentation is credible. What is a credible source? Most sources that end in .gov (government sites) are reliable. Sites ending in .edu can also be trustworthy. But sometimes students, not scientists, write the information. Always find out who the author of the article is before proceeding. Some .org and .com sites are credible, but you need to analyze the contents to verify their credibility. When you review a source, ask yourself these questions:

Who authored the article?
Is this person an expert on adaptations of organisms?
What is the purpose of the article?
Does the article state facts that scientists can prove with evidence?
Are there opinions in the article?
How old is the article?
Do other credible sources support the statements in this article?