Hello,

The GRE subject test requirements will vary from program to program. Most programs only require a GRE subject test in Biology when it comes to dentistry and some don't even require an additional GRE subject test. Apart from the GRE subject tests if required, your son will also have to subjmit GRE General test scores. 

For more information about the GRE, visit: https://studyabroad.careers360.com/exams/gre

he has to do biology and chemistry