Most likely the students are using a crude measurement of time, like a stopwatch. They would get the best results with a scientific apparatus that uses a computer and optical sensors. Even recording their dropped objects with a video camera and analyzing the video would give more consistent results. Results will also vary greatly if different people are taking the time measures instead of one person making all measurements.
The correct answer is: check for correct placement of the NG tube.
An adequately functioning nasogastric (NG) tube shouldprevent nausea and vomiting because stomach contents
are continuously being removed. Using the NG after abdominal surgery is a routine postoperative procedure until gastrointestinal tract start tofunction properly. The patency of the tube should be checked together with the amount and character of gastric drainage.
B. some species die out when environmental changes occur
Answer:
The <u><em>second </em></u>line of defense.
Explanation:
In our bodies the <em><u>second line of defense</u></em> includes active immunity. It contains non-specific immune responses, but yet still contains specific responses for certain things such as inflammatory and fevers.
Answer:
37oC - temperature
It is important that the temperature is controlled because it maintains consistency and safety.
Explanation:
-Temperature is a common type of controlled variable.
-A control variable is anything that is held constant or limited in a research study
