A drug trial was carried out to study the effect of a drug on mice - Scottish Highers Human Biology - Question 22 - 2019

First, to find the daily dosage per mouse, we need to convert the body mass into kilograms since the drug dosage is given in mg per kg. The average body mass of the mice is 20g, which is:

$$20g = 0.02kg$$

Now, using the dosage of 1 mg per kg, the amount of drug given to each mouse per day is:

$$1mg/kg \times 0.02kg = 0.02mg$$