1. Which of the following are carcinogens (risk factors that are known to cause cancer)? a. harmful chemicals b. genetic factors
c. excessive exposure to UV rays
d. all of the above
e. none of the above

Which of the following is most likely the result of an organism having lipids in its body a) water cannot be absorbed through the surface of a leaf b)human eats fruits to get a quick source of energy c) a sheep sleeps for more hours in the winter d) a warm river is filled with fish and algae