Which of these organisms skeleton also acts as a skin

a. flower
b. elephant
c. tree
d. crab

The answer is joseph is observing the colour of the reaction mixture to see whether proteins are present in the given solution.

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.