Answer:
They test or measure something.
Explanation:
Primary research articles report on research that has been completed. Therefore, a primary research article will review and analyze studies, and will state the research question and hypotheses of the studies presented. A primary research article does not test or measure anything, but will report on studies that do.
The graph is showing us the tide height in feet in the left side and the hight up and down.
Most bacteria are heterotrophic decomposers, which means they depend on other organisms for food and feed on dead matter.
If you could tell me what cell it would be easier. Sorry I have to post it on Answer but I't does not show the commentary or whatever you guys call it.