a group of cells that are similar in function, structure and origin.
Answer:
Make sure all tested rats are the same age.
Offer the same type of food to the rats in each trial.
Explanation:
<em>In order to be able to isolate the effects of one particular variable during a research, all the subjects in each trial must be subjected to the same conditions except the variable whose effects is being isolated.</em>
Hence, Kate must offer the same type of food to the rats in each trial as well as make sure that all tested rats are the same age.
The awsner is cones....your welcome
I believe it is C and D! ☺️
1-Be cute-Adult have wrinkles
2-Get bfs or gfs-Adults are too busy with working to pull
3-Be broke-Adults can make more money than teens