D. Friends of the scientists who wrote the articles
Because the word “peer” is also another word for friends
The answer is
C. The way the layer interacts with the layer below it.
The answer is : Individuals
The drug side effect is the result from the interaction from the substance contained by the drugs and the environment in our body.
Which means that the effect will be very much influenced by the individual's age, wage, height, gender, diet, metabolism, muscle mass, etc.
Cnidarians were the first phylum that scientists saw tissue level organization in. Tissue level organization meaning cells all of one type start to function in a unified way.
