Answer:
Only because biological reasons, and it is not a rule - only average.
Explanation:
He was not the second son of his father
Answer:
Animals should not be used for performing experiments. I say this because while you are performing the experiment on the animal it may go wrong and cause that animal to lose its life. By doing so you are putting the animal in danger of testing things on them. Testing experiments on animals isn't the only way to figure out if soething works. Animals should not be used as guinea pigs.
Explanation: That's all I got......hope it helps:)