Which of the following is not true of a drug?

a) it may change anyone's mood
b) it may help someone cope with life.
c) they may be prescribed by a doctor
d) they may be bought over a chemist's counter
e) some drugs are completely harmless

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?

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

What is the inability of an individual or a society to achieve a minimum standard of living known as ?