In the human body which system functions in detecting and responding to stimuli? a. endocrine b. circulatory c. muscular d. nervous

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

The response is the basis for vaccination. primary secondary tertiary none of the above

What noticeable trend from this graph might be used to make a conclusion?