"An organism is hungry, so it eats some food".
What is the stimulus and the response?​

Question 4 using myplate's daily food plant for 2000 kilocalories as a reference, the servings from the protein foods group in this menu are a. adequate overall, and consistent with the dietary guidelines 2010 recommendations. b. short 2 ounce equivalents. c. inadequate in terms of the recommendations for a 2000 kcal diet. d. adequate overall, but inconsistent with the dietary guidelines 2010 recommendations.

Which experiment would most likely contain experimental bias ?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?