They are the “last trophic level” in some hierarchies because they feed on everything (National Geographic). However, according to the strict trophic level definition they would be primary consumers
Genes are heredity that are transferred from a parent to offspring and determine a physical or mental characteristic for the offspring
Create an experiment for this question: How is stomach acid neutralized in the small intestine?
Answer: As we already know it is the pancreas that manufactures enzymes that digest nutrients and releases bicarbonate to neutralize acid chyme that enters the small intestine. An experiment that could be performed to answer this would be to put in a glass flask bicarbonate soda. Then cover it with a balloon to turn it upside down and fill the balloon with the bicarbonate soda. Next you add vinegar to the flask and put back the balloon and slowly pour the bicarbonate soda and see the neutralization reaction that will take place.
I hope it helps, Regards.