Mitochondria create energy needed for cellular activities. 

Radioactive isotopes help scientists                  

Your hypothesis must be  

In a scientific study, the dependent variable  

What are some differences between prokaryote and eukaryote cells?                   

TexDOT decides to test another type of roadbed material for 18-wheeler use. Three companies submit material to be tested.  The scientists must devise a method that will test each material properly. The uncle of one of the scientists owns one of the companies. This is                   a.  A potential for bias                           b. A conflict of interest                       c. illegal                   d.  Not a problem                                   e.  A and B  

Continue with information from question 19: How could the experiment be improved and redone?                  

Which represents the smallest organic molecule?                  

Which is NOT true about enzymes?

Which represents the smallest organic molecule?