Biology or other science degree plan needed

[vetvso]

I am currently researching out for my son who will be graduating next month. He is 16 and currently wants to get a PHD in biology based research. I trying to find out if a BS from TESU in Biology is even possible from a test out low cost option.

I see plenty of LL classes for him but need to put a degree plan together that allows him to test out as much as possible. 

He currently has the following:

From University of Maine
Eng101
ENG Lit
College Algebra
Introduction to statistics 

Aleks:
Beginning Algebra 

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Another science BS degree could also work but needs to be able to feed into a Masters in a Bio related field.