They're said to be Sex-Linked. Hope this helps!
The answer is called monoclonal. Hope this helps and please don't forget to thank me.
1. Testing only one variable
A controlled variable means its the one that stays the same. In a controlled experiment, it means there is only one manipulated, (changed) variable.
The experiment conducted by Paul was not a waste of his time and resources even though he could not accomplish the experiment he initially prepared to conduct. The reluctance of the penguins to eat burgers even though they were starving and losing weight pointed towards the fact that they do not find junk food appealing. It could be concluded from their reluctance that they will eat only their normal diet rather than something they have never eaten before.
A torn rotator cuff is likely but in all its most likely a thrown out shoulder due to the strain of the force of the throw
