An expiriment was done to determine if the rate at wich a patato cooked depended on the temperature of water in which it was boild. What are the independent and dependent variable??

The independent variable  is  the  potato   and dependent variable  will  be  the  temperature

Explanation:

When  this  experiment  is  done  it  consider  about  the  boiling  rate  of  the  temperature  which  it  helps  to  cook  the  potato.  in  other  words  when  you  do  this  experiment  you  will  try  different  temperature  levels  on  the  same  type  of  vegetable  which  is  a  potato.  so  the  variable  called  temperature  will  be  dependent  because  its  the  variable  that  we  change.  and  the  variable  called  potato  will  be  the  independent.

answer; ///(b) it is composed of four protein chains and four heme groups;

2%? i tried finding the exact sorry if it's not 100% correct ; -;