Please help answer all these questions!!

Who is better, messi or cristiano, i need this for a chemistry class. asap

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa